I just swapped my TT Diamond flat SS for a Bix'n Andy TacSport 2 stage. It is going in my RimX so I needed the Low .36 Seer for it and I wanted the flat shoe. I bought it from Short Action Precision. When I removed the 3 side plate screws & got the plate off there was a TINY spring and detent ball laying inside the trigger assembly. I had know idea where it went. I proceeded to replace the parts and call Bullet Central. Ely or Evan called me back the next morning an explained where those parts went and that they were not necessary for the trigger to work. The just took up a little side to side play in the trigger shoe. I had searched Google and Youtube without finding anything that talked about or showed those parts. I'll upload my YouTube video I made showing it. Hope this helps someone else out.