I forgot to include that the mod semi-breaks for Michael right after the point where Jimmy steals Michael's previous Personal Vehicle.
The mod ends up being completely unable to remove the New Personal Vehicle Michael gets, so when you spawn the one you save, there ends up being 2 Personal Vehicle markers on the map. And I don't know what causes it, but sometimes there ends up being 3, the 3rd marker being attached to literally any random vehicle that an NPC is driving so the marker follows them.
These markers end up still showing up on the map even after switching to a different character.
This works perfectly, however it has trouble saving Benny's vehicles. I use a mod that brings Benny's workshop to singleplayer, and this mod struggles to save them.
Every single modification exclusive to Benny's transformed vehicles does not end up getting saved. So I spend money putting modifications like antennas or wipers or increasing the power of Hydraulics...
And when I save and spawn the vehicle, these things do not get saved. The Chino Custom also sometimes spawns without a roof, which if I'm aware, you cannot even modify at all.