I have a quick question regarding calibrating the Bitzenburger for offset.

I am using the Easton FMJ 340's @ 28"s and am utilizing the 2" Blazer vanes. This is fora Bowtech Old Glory 29" draw @ 67#'s. I have the straight fletch but would like a 2-4 degree offset and don't see any instructions within the manual on how to properly calibrate the offset. Any recommendation on the proper offset and how to calibrate to jig?

Thanks for the help.