I don't know about his other props (though I had heard rumors before he even showed up in the GB hobby), but pretty much everything he does in the world of Ghostbusters has been a recast of someone else's work. He recast Bowelrock's studio pack, he recast KCGhostbuster's Bumper, recast MMM's HGA, and for the moment he is selling recasts of MMM's proton gun body and parts he bought from another recaster called Propcrazed. In his latest video he claims he will start offering his own proton gun soon, and if history is to repeat itself I would imagine that means he found someone else to recast.
He has also threatened other members with violence, on video, not to mention another video he posted of himself urinating on the photo of another RPF member.