Please note that fitting the Team Prime shock to the 12R5.x is not plug-and-lay. You need the stock bottom ball cup (the Team Prime one is too short), but then you also need a different ball for the top (the AE one is too large). The T.O.P. balls work (as recommended a few pages back), but take an M2.5 screw as opposed to AE's M3 screw. To keep it from flopping around in the mount, I used a flat-head screw and tightened to the carbon plate to let the cone head sink in and keep it centered. The T.O.P. ball does have a bit of play inside the shock top, though, so I'm still trying to figure out how to tighten that up (need a really thin o-ring, I think).

Anyway, I didn't know any of this when I bought the Team Prime shock, so hopefully you can learn through my struggles. I'd love to hear from other people who have fit the shock for other/better ideas.