I have found that when setting up a Whisker Biscuit (no matter what bow) it's best to start with a level nock, even tiller, perfect center shot TO THE STRING and a straight biscuit. Most of my bows only needed very little adjustments from there and my single cam needed nothing more. I was shooting perfect groups and same point of impact with both field points and broadheads 5 min. after setting it up and sighting it in.

As far as where to put your loop. I always set up my rest first so that my arrow passes throught the bolt hole for the rest (when looking at it from the side). I then tie in my nock set so that the arrow is level.

Make sure you have the proper size opening, if in doubt go slightly bigger than you think you need. I shoot the biggestopening they make (XL)and have no issues with vane waves what soever.

Good luck