UPDATE:

I received new launcher arms in the mail today... the 3rd generation variety. I took the Hostage off and slapped the Whammy back on and am happy to report that these new launcher arms do the trick.... no shelf contact! I am very pleased with this design. I can nock an arrow and lay my bow down and the arrow stays in the rest. I just need to figure out how to prevent the D-loop from pinching the arrow and making it "jump" as I draw the bow. The rest was certainly not at fault the one time my arrow came off the rest. I'm very excited to take my bow to the range tomorrow where I'll get a chance to try and tune it.

Spot-Hogg was fantastic... I told them I didn't like the 2nd generation prongs and they shipped me new ones... no charge! They showed up and fixed the problems I was having. I'm pretty sure I can shoot cock vane up or down with no problems on my Marquis! I'll give one more update on how it tunes tomorrow, but after that I should have all the bugs worked out.

Happy shooting,
da Walleyeking