I sometimes shoot my bows with the quiver off, but I mostly shoot with them on. I see no discernable difference in arrow flight/tuning either way. I do realize a better shooting platform with the quiver on. Less handshock, quieter bow, steadier hold. I won't shoot a 3D without my quivers on! I sometimes shoot at my backyard range bare bow as it just feels neat to shoot them naked sometimes! So light and lively. Regardless, I shoot 3D to make me a better hunter (shooter), first and foremost... so I'm in the camp that you should shoot with what you will hunt with. The bow just feels more stable with the quiver on.