To add, it sound like it might be OK. The problem sounds like bow tuning issue to me. Because you are getting fletching interference I'd try paper tuning it with a bare shaft to see how that leaves the bow. I can tell you that the rest operates flawlessly if set up well and the bow is tuned to the arrows you are shooting.

And if all else fails the guy you want to talk to at Muzzy is Mark Land. Most likely he'll see this post and add some help.