So I've been poking around at this for a while now and the closest I've gotten was removing this check:
Obviously I'm no expert at client editing and only have somewhat of an idea of what I'm doing, so I've also crashed a lot while messing with addresses around this area.
I'm requesting the address(es) to be able to Item Smega untradeable items on v83 (if that's even possible). This would be greatly appreciated and would really help me out, thanks!