Well thanks a lot to you :) As I said in the credits wouldn't have been able to do it without your mod as a base ! ZScript always seemed easy but so badly documented I didn't bother getting into it. This actually taught me a lot and forced me to look at the ZScript part of GZD's github.
Actually if you're interested in similarly styled minimods I also made another one based off a user request that use roughly the same base system (EventHandler though this one is Static) to let you keep your inventory and weapons after a Death Exit :
https://forum.zdoom.org/viewtopic.php?f=43&t=71364
In all cases thanks for being understanding. Always glad to have positive exchanges on the internet :)