>>10009678The neckjoints of the Armor, XV and Super versions are bigger, so you can only put their heads on PC Trunks by filling the heads with something so they're not floppy, like putty.
It's what I did for my Gohans at least.
Any third party heads were also made with these releases in mind, so same applies.
But they might be tighter because 3rd party, so who knows.