I'm shooting the 82nd with a QD and it shoots great, the rest drops fast enough for my bow. specs 28", 61#
before you use the clamp, try to see if which launcher you prefer, one of the two will hit your riser when mounted, at least it did on mine.
I used the clamp and put it on losely, so when you draw back the bow it will slide into place and then you can tighten the screws.
Make sure that the launcher is in a 90 degree angle facing up, that way it drops fast enough.

F.