Don't take this the wrong way, but why would you even be considering the Whisker Biscuit if you are worried about clearance on your fletchings??
I do have a suggestion though, Tiger Tuff rest. If I didn't shoot a Bodoodle myself, I would check into this one. I got a buddy that has one and shoots 3D and hunting with it. Is quiet, accurate, and the arrow wont fall off.
But, I have been using my Bodoodle for about 3yrs now and have had no troubles shooting 2",3",4" vanes and feathers with it, so I'll stick with what works.