Re: which triple shot (flat or arched) for my PRS SE?
Hi Golem, I absolutely understand your concern. Unfortunately, triple shots do not come angled, unless you get the arched ones. It is very common to have a guitar with a tune-o-matic bridge (schecters, esps, washburns, prs, etc) that have flat bottom, yet angled pickup rings. I have put triple shots in two guitars and tried both flat and arched.
1.) Flat Triple Shots - they are not angled so you pickup is not exactly parallel with the strings. This could be remedied with a little foam or something in the cavity to nudge the pickup to the correct angle. Or, you could just leave it because the angle does not make a huge difference in tone if you ask me. These rings are very thin.
2.) Carved Triple Shots - These will have the angle that you want, but leave a big arch gap between the wood and the pickup ring. That is exactly how my schecter is set up and the gap doesn't bother me. If it did, it would be pretty easy to sand down the pickup ring to remove the gap I imagine.
So, you have got the flat ones for you PRS and they should work fine. If you really want angled ones because they thicker and look better you can exchange for some. I'll try to find some pics of my angled rings so you can see how that looks.