RE: Tuning with a T.R. DropZone rest
IU would have to say go with what the arrow & bow want and not what you think you should see.
The goldtip arrows are what is eating your heat shrink- (if they are the rough kind?)
When I had my TR-DZ on my Patriot (same cam as your MM) it tuned a tad below square.
Now with a TT shaky hunter installed on it I had to pull 1/2 turn out of the top limb bolt to get it to tune correctly.
Was this a limb deflection issue? I dunno, just know it worked.