Thanks for the tips guys.
I have a Jennings Rackmaster (not Rackmater Lite) single cam. I can't put and STS system on it, but I can put Jennings Shock Stop on it (same concept as STS system).
Gold Tip 5575 hunter arrows, 100 gr. tips

I took my quiver mount off after hunting season, so there is no vibration from it.

I hold my grip consistent all the time, so there is no problem there.