diff --git a/CONTRIBUTIONS.md b/CONTRIBUTIONS.md
index 0b35c40e..55d2205b 100644
--- a/CONTRIBUTIONS.md
+++ b/CONTRIBUTIONS.md
@@ -21,6 +21,7 @@ for details!
 * [Ben Harris](mailto:mail@bharr.is) (@bharrisau)
 * [Daniel Ziegenberg](mailto:daniel@ziegenberg.at) (@ziegenberg)
 * [Ignacio Serrano](mailto:ignic@ignic.com) (@ignic)
+* [Ilya Kulakov](mailto:kulakov.ilya@gmail.com) (@Kentzo)
 * [Michael Gisbers](mailto:michael@gisbers.de) (@mgisbers)
 * [Miquel Bonastre](mailto:mbonastre@yahoo.com) (@mbonastre)
 * @netravnen
diff --git a/INITIAL-COMMANDS.md b/INITIAL-COMMANDS.md
index 8b64d281..79773bd9 100644
--- a/INITIAL-COMMANDS.md
+++ b/INITIAL-COMMANDS.md
@@ -10,30 +10,40 @@ Initial commands
 
 [⬅️ Go back to main README](README.md)
 
-> ⚠️ **Warning**: These command are inteneded for initial setup. If you are
+> ⚠️ **Warning**: These commands are intended for initial setup. If you are
 > not aware of the procedure please follow
 > [the long way in detail](README.md#the-long-way-in-detail).
 
 Run the complete base installation:
 
     {
-      /tool/fetch "https://git.eworm.de/cgit/routeros-scripts/plain/certs/ISRG-Root-X2.pem" dst-path="isrg-root-x2.pem" as-value;
+      :local BaseUrl "https://git.eworm.de/cgit/routeros-scripts/plain/";
+      :local CertFileName "ISRG-Root-X2.pem";
+      :local CertFingerprint "69729b8e15a86efc177a57afb7171dfc64add28c2fca8cf1507e34453ccb1470";
+
+      :put "Importing certificate...";
+      /tool/fetch ($BaseUrl . "certs/" . $CertFileName) dst-path=$CertFileName as-value;
       :delay 1s;
-      /certificate/import file-name="isrg-root-x2.pem" passphrase="";
-      :if ([ :len [ /certificate/find where fingerprint="69729b8e15a86efc177a57afb7171dfc64add28c2fca8cf1507e34453ccb1470" ] ] != 1) do={
+      /certificate/import file-name=$CertFileName passphrase="";
+      :if ([ :len [ /certificate/find where fingerprint=$CertFingerprint ] ] != 1) do={
         :error "Something is wrong with your certificates!";
       };
       :delay 1s;
+      :put "Renaming global-config-overlay, if exists...";
       /system/script/set name=("global-config-overlay-" . [ /system/clock/get date ] . "-" . [ /system/clock/get time ]) [ find where name="global-config-overlay" ];
       :foreach Script in={ "global-config"; "global-config-overlay"; "global-functions" } do={
+        :put "Installing $Script...";
         /system/script/remove [ find where name=$Script ];
-        /system/script/add name=$Script owner=$Script source=([ /tool/fetch check-certificate=yes-without-crl ("https://git.eworm.de/cgit/routeros-scripts/plain/" . $Script . ".rsc") output=user as-value]->"data");
+        /system/script/add name=$Script owner=$Script source=([ /tool/fetch check-certificate=yes-without-crl ($BaseUrl . $Script . ".rsc") output=user as-value]->"data");
       };
+      :put "Loading configuration and functions...";
       /system/script { run global-config; run global-functions; };
+      :put "Scheduling to load configuration and functions...";
       /system/scheduler/remove [ find where name="global-scripts" ];
       /system/scheduler/add name="global-scripts" start-time=startup on-event="/system/script { run global-config; run global-functions; }";
+      :put "Renaming certificate by its common-name...";
       :global CertificateNameByCN;
-      $CertificateNameByCN "ISRG Root X2";
+      $CertificateNameByCN $CertFingerprint;
     };
 
 Then continue setup with
diff --git a/README.md b/README.md
index ffbc27ed..1f7c8edd 100644
--- a/README.md
+++ b/README.md
@@ -214,61 +214,61 @@ There's much more to explore... Have fun!
 Available scripts
 -----------------
 
-* [Find and remove access list duplicates](doc/accesslist-duplicates.md)
-* [Upload backup to Mikrotik cloud](doc/backup-cloud.md)
-* [Send backup via e-mail](doc/backup-email.md)
-* [Save configuration to fallback partition](doc/backup-partition.md)
-* [Upload backup to server](doc/backup-upload.md)
-* [Download packages for CAP upgrade from CAPsMAN](doc/capsman-download-packages.md)
-* [Run rolling CAP upgrades from CAPsMAN](doc/capsman-rolling-upgrade.md)
-* [Renew locally issued certificates](doc/certificate-renew-issued.md)
-* [Renew certificates and notify on expiration](doc/check-certificates.md)
-* [Notify about health state](doc/check-health.md)
-* [Notify on LTE firmware upgrade](doc/check-lte-firmware-upgrade.md)
-* [Check perpetual license on CHR](doc/check-perpetual-license.md)
-* [Notify on RouterOS update](doc/check-routeros-update.md)
-* [Collect MAC addresses in wireless access list](doc/collect-wireless-mac.md)
-* [Use wireless network with daily psk](doc/daily-psk.md)
-* [Comment DHCP leases with info from access list](doc/dhcp-lease-comment.md)
-* [Create DNS records for DHCP leases](doc/dhcp-to-dns.md)
-* [Automatically upgrade firmware and reboot](doc/firmware-upgrade-reboot.md)
-* [Download, import and update firewall address-lists](doc/fw-addr-lists.md)
-* [Wait for global functions und modules](doc/global-wait.md)
-* [Send GPS position to server](doc/gps-track.md)
-* [Use WPA network with hotspot credentials](doc/hotspot-to-wpa.md)
-* [Create DNS records for IPSec peers](doc/ipsec-to-dns.md)
-* [Update configuration on IPv6 prefix change](doc/ipv6-update.md)
-* [Manage IP addresses with bridge status](doc/ip-addr-bridge.md)
-* [Run other scripts on DHCP lease](doc/lease-script.md)
-* [Manage LEDs dark mode](doc/leds-mode.md)
-* [Forward log messages via notification](doc/log-forward.md)
-* [Mode button with multiple presses](doc/mode-button.md)
-* [Manage DNS and DoH servers from netwatch](doc/netwatch-dns.md)
-* [Notify on host up and down](doc/netwatch-notify.md)
-* [Visualize OSPF state via LEDs](doc/ospf-to-leds.md)
-* [Manage system update](doc/packages-update.md)
-* [Run scripts on ppp connection](doc/ppp-on-up.md)
-* [Act on received SMS](doc/sms-action.md)
-* [Forward received SMS](doc/sms-forward.md)
-* [Play Super Mario theme](doc/super-mario-theme.md)
-* [Chat with your router and send commands via Telegram bot](doc/telegram-chat.md)
-* [Install LTE firmware upgrade](doc/unattended-lte-firmware-upgrade.md)
-* [Update GRE configuration with dynamic addresses](doc/update-gre-address.md)
-* [Update tunnelbroker configuration](doc/update-tunnelbroker.md)
+* [Find and remove access list duplicates](doc/accesslist-duplicates.md) (`accesslist-duplicates`)
+* [Upload backup to Mikrotik cloud](doc/backup-cloud.md) (`backup-cloud`)
+* [Send backup via e-mail](doc/backup-email.md) (`backup-email`)
+* [Save configuration to fallback partition](doc/backup-partition.md) (`backup-partition`)
+* [Upload backup to server](doc/backup-upload.md) (`backup-upload`)
+* [Download packages for CAP upgrade from CAPsMAN](doc/capsman-download-packages.md) (`capsman-download-packages`)
+* [Run rolling CAP upgrades from CAPsMAN](doc/capsman-rolling-upgrade.md) (`capsman-rolling-upgrade`)
+* [Renew locally issued certificates](doc/certificate-renew-issued.md) (`certificate-renew-issued`)
+* [Renew certificates and notify on expiration](doc/check-certificates.md) (`check-certificates`)
+* [Notify about health state](doc/check-health.md) (`check-health`)
+* [Notify on LTE firmware upgrade](doc/check-lte-firmware-upgrade.md) (`check-lte-firmware-upgrade`)
+* [Check perpetual license on CHR](doc/check-perpetual-license.md) (`check-perpetual-license`)
+* [Notify on RouterOS update](doc/check-routeros-update.md) (`check-routeros-update`)
+* [Collect MAC addresses in wireless access list](doc/collect-wireless-mac.md) (`collect-wireless-mac`)
+* [Use wireless network with daily psk](doc/daily-psk.md) (`daily-psk`)
+* [Comment DHCP leases with info from access list](doc/dhcp-lease-comment.md) (`dhcp-lease-comment`)
+* [Create DNS records for DHCP leases](doc/dhcp-to-dns.md) (`dhcp-to-dns`)
+* [Automatically upgrade firmware and reboot](doc/firmware-upgrade-reboot.md) (`firmware-upgrade-reboot`)
+* [Download, import and update firewall address-lists](doc/fw-addr-lists.md) (`fw-addr-lists`)
+* [Wait for global functions und modules](doc/global-wait.md) (`global-wait`)
+* [Send GPS position to server](doc/gps-track.md) (`gps-track`)
+* [Use WPA network with hotspot credentials](doc/hotspot-to-wpa.md) (`hotspot-to-wpa` & `hotspot-to-wpa-cleanup`)
+* [Create DNS records for IPSec peers](doc/ipsec-to-dns.md) (`ipsec-to-dns`)
+* [Update configuration on IPv6 prefix change](doc/ipv6-update.md) (`ipv6-update`)
+* [Manage IP addresses with bridge status](doc/ip-addr-bridge.md) (`ip-addr-bridge`)
+* [Run other scripts on DHCP lease](doc/lease-script.md) (`lease-script`)
+* [Manage LEDs dark mode](doc/leds-mode.md) (`leds-day-mode`, `leds-night-mode` & `leds-toggle-mode`)
+* [Forward log messages via notification](doc/log-forward.md) (`log-forward`)
+* [Mode button with multiple presses](doc/mode-button.md) (`mode-button`)
+* [Manage DNS and DoH servers from netwatch](doc/netwatch-dns.md) (`netwatch-dns`)
+* [Notify on host up and down](doc/netwatch-notify.md) (`netwatch-notify`)
+* [Visualize OSPF state via LEDs](doc/ospf-to-leds.md) (`ospf-to-leds`)
+* [Manage system update](doc/packages-update.md) (`packages-update`)
+* [Run scripts on ppp connection](doc/ppp-on-up.md) (`ppp-on-up`)
+* [Act on received SMS](doc/sms-action.md) (`sms-action`)
+* [Forward received SMS](doc/sms-forward.md) (`sms-forward`)
+* [Play Super Mario theme](doc/super-mario-theme.md) (`super-mario-theme`)
+* [Chat with your router and send commands via Telegram bot](doc/telegram-chat.md) (`telegram-chat`)
+* [Install LTE firmware upgrade](doc/unattended-lte-firmware-upgrade.md) (`unattended-lte-firmware-upgrade`)
+* [Update GRE configuration with dynamic addresses](doc/update-gre-address.md) (`update-gre-address`)
+* [Update tunnelbroker configuration](doc/update-tunnelbroker.md) (`update-tunnelbroker`)
 
 Available modules
 -----------------
 
-* [Manage ports in bridge](doc/mod/bridge-port-to.md)
-* [Manage VLANs on bridge ports](doc/mod/bridge-port-vlan.md)
-* [Inspect variables](doc/mod/inspectvar.md)
-* [IP address calculation](doc/mod/ipcalc.md)
-* [Send notifications via e-mail](doc/mod/notification-email.md)
-* [Send notifications via Matrix](doc/mod/notification-matrix.md)
-* [Send notifications via Ntfy](doc/mod/notification-ntfy.md)
-* [Send notifications via Telegram](doc/mod/notification-telegram.md)
-* [Download script and run it once](doc/mod/scriptrunonce.md)
-* [Import ssh keys for public key authentication](doc/mod/ssh-keys-import.md)
+* [Manage ports in bridge](doc/mod/bridge-port-to.md) (`mod/bridge-port-to`)
+* [Manage VLANs on bridge ports](doc/mod/bridge-port-vlan.md) (`mod/bridge-port-vlan`)
+* [Inspect variables](doc/mod/inspectvar.md) (`mod/inspectvar`)
+* [IP address calculation](doc/mod/ipcalc.md) (`mod/ipcalc`)
+* [Send notifications via e-mail](doc/mod/notification-email.md) (`mod/notification-email`)
+* [Send notifications via Matrix](doc/mod/notification-matrix.md) (`mod/notification-matrix`)
+* [Send notifications via Ntfy](doc/mod/notification-ntfy.md) (`mod/notification-ntfy`)
+* [Send notifications via Telegram](doc/mod/notification-telegram.md) (`mod/notification-telegram`)
+* [Download script and run it once](doc/mod/scriptrunonce.md) (`mod/scriptrunonce`)
+* [Import ssh keys for public key authentication](doc/mod/ssh-keys-import.md) (`mod/ssh-keys-import`)
 
 Installing custom scripts & modules
 -----------------------------------
diff --git a/global-functions.rsc b/global-functions.rsc
index 8ade79bf..70269c80 100644
--- a/global-functions.rsc
+++ b/global-functions.rsc
@@ -167,8 +167,8 @@
     $LogPrint warning $0 ("Failed downloading certificate with CommonName '" . $CommonName . \
       "' from repository! Trying fallback to mkcert.org...");
     :do {
-      :if ([ $CertificateAvailable "ISRG Root X1" ] = false) do={
-        $LogPrint error $0 ("Downloading required certificate failed.");
+      :if ([ :len [ /certificate/find where common-name="ISRG Root X1" ] ] = 0) do={
+        $LogPrint error $0 ("Required certificate is not available.");
         :return false;
       }
       /tool/fetch check-certificate=yes-without-crl http-header-field=({ [ $FetchUserAgentStr $0 ] }) \
@@ -203,12 +203,19 @@
 
 # name a certificate by its common-name
 :set CertificateNameByCN do={
-  :local CommonName [ :tostr $1 ];
+  :local Match [ :tostr $1 ];
 
   :global CleanName;
+  :global LogPrint;
 
-  :local Cert [ /certificate/find where common-name=$CommonName ];
+  :local Cert ([ /certificate/find where (common-name=$Match or fingerprint=$Match or name=$Match) ]->0);
+  :if ([ :len $Cert ] = 0) do={
+    $LogPrint warning $0 ("No matching certificate found.");
+    :return false;
+  }
+  :local CommonName [ /certificate/get $Cert common-name ];
   /certificate/set $Cert name=[ $CleanName $CommonName ];
+  :return true;
 }
 
 # multiply given character(s)
@@ -1387,8 +1394,8 @@
 
 # lock script against multiple invocation
 :set ScriptLock do={
-  :local Script   [ :tostr $1 ];
-  :local WaitMax ([ :tonum $3 ] * 10);
+  :local Script  [ :tostr  $1 ];
+  :local WaitMax [ :totime $2 ];
 
   :global GetRandom20CharAlNum;
   :global IfThenElse;
@@ -1477,6 +1484,10 @@
     :set ($ScriptLockOrder->$Script) ({});
   }
 
+  :if ([ :typeof $WaitMax ] = "nil" ) do={
+    :set WaitMax 0s;
+  }
+
   :if ([ :len [ /system/script/find where name=$Script ] ] = 0) do={
     $LogPrint error $0 ("A script named '" . $Script . "' does not exist!");
     :error false;
@@ -1496,12 +1507,13 @@
   :local MyTicket [ $GetRandom20CharAlNum 6 ];
   $AddTicket $Script $MyTicket;
 
-  :local WaitCount 0;
-  :while ($WaitMax > $WaitCount && \
+  :local WaitInterval ($WaitMax / 20);
+  :local WaitTime $WaitMax;
+  :while ($WaitTime > 0 && \
       ([ $IsFirstTicket $Script $MyTicket ] = false || \
       [ $TicketCount $Script ] < [ $JobCount $Script ])) do={
-    :set WaitCount ($WaitCount + 1);
-    :delay 100ms;
+    :set WaitTime ($WaitTime - $WaitInterval);
+    :delay $WaitInterval;
   }
 
   :if ([ $IsFirstTicket $Script $MyTicket ] = true && \
@@ -1513,7 +1525,7 @@
 
   $RemoveTicket $Script $MyTicket;
   $LogPrint debug $0 ("Script '" . $Script . "' started more than once" . \
-    [ $IfThenElse ($WaitCount > 0) " and timed out waiting for lock" "" ] . "...");
+    [ $IfThenElse ($WaitTime < $WaitMax) " and timed out waiting for lock" "" ] . "...");
   :return false;
 }