I managed to get the SMG on Dead Center to be randomized and fixed the wacky spawn positions for Dead Air, so no more weapons on the floor or clipping through the table. I did figure out how to get the chrome shotguns in Dead Center to also be randomized, but it completely messes up their positioning so they're laying on the floor clipping into the weapon locker.

Maxwell

Tried adding this to Dead Center's chapter 1 (since only the chrome and silenced smg spawns on it) but couldn't if anyone finds out how to do it, let me know.