The game is crashing when you try to cut clothes that have been reinforced, also scissors seem to crash the game if you try to cut something that has a material that it can cut and other that it not, like leather/kevlar. Tested on version 2295 windows console.
Also, I could have a look in that z-level stuff (or any programming related issue you might need help with), I don't have much experience with game development but at least I could check it out and for the moment I have some spare time to kill.
And keep up with the awesome work!!!