@meleu I ran the script today for the first time and installed an overlay for elevator.zip. It placed everything in the correct spots but no overlay appeared in game. It did say that the elevator preset was active. I also noticed that the elevator preset became active on all mame roms after running.
I'm on a pi4, newest build. I removed the elevator.zip.cfg file in the ROM directory and was able to get the overlay working. Just wanted to post what happened to me since I'm on pi4 and there hasn't been much feedback.