I would want the arrow longer, and get that broadhead away from the biscuit. If you go with a longer arrow, you probably should move up to a 2216 instead of the 2117, unless you want to back off on the draw weight. The 2216 has more spine (stiffness) than the 2117, but has almost identical weight, so not much will really change, but they should shoot better. Hard to say just how long your arrows should be without seeing the setup. As Bowfanatic said, get the biscuit close to the riser, and figure arrow length from there. The vanes inside the biscuit is no big deal, but I wouldn't want feathers in there.