Naphtali....The innerframe work of the Arrowmaster is semi-rigid and can stand a good deal of side pressure, but I'd think you would want to move the quiver to your side, either by sliding the shoulder strap to the front a bit,with the arrow slot by your fingertips or you can move the quiver to your front.
Allan...good eyes! Yes, the standard rhino on the website is a "one-of" that I built as a prototype for myself, to find out if it was feasible to make bowcases from the Predator Bucksuede....in fact we have made a few and the material works, but slighly cost prohibitive to offer as a stock item...however we could build you one on a custom basis. Best time to actually catch me is around 9pm central, but I would be more than happy to return your call at any time thats good for you.