browse local files of gmod then backtrack to steamapps, then go to workshop>content>4000 and open the folder inside of 4000 named 3206516933, inside should be the gma file for endiving, then open that with notepad++.
then use search on the top of the notepad menu to search up "local oxygen_drain" and change the values and stuff of the local values next to it as you see fit, i used this method and IT WORKED!!!