The real beauty of the Whisker is that you don' t need to worry about fletching unevenly contacting the rest and deflecting your arrow if your nock is turned a little wrong. if you start butchering it you might as well buy a 3 prong isolation rest, and fiddle with it until you remove fletching contact. add a little extra glue to your fletching and hopefully you don' t have to mess with them much.

But as was said, lot' s of info on the biscuit in previous posts.