Hey grizzly, Don' t worry about the question, its only been asked 86 times

Prong rests and Helical ussually do not get along.

If you are going to stay with the helical then I would suggest a drop-away.

Or, you can change to a 2 or 3 deg offset (still great with brodheads). Usually you cna fiddle enough to get them to work with a prong rest.