Lately I have seen two patterns that use EZ-Body to prevent the rabbit from fouling. The first was an updated version of Boyle's Bonito Bunny in one of the recent FFSW issues. The second was a pattern developed by the guys at First Light for chasing SBFT. Both use mono or a thread puller to pull the forward section of the rabbit through the ez-body and then tie off on the shank leaving a proportionate amount of the ez-body to the rear. I have used about 1/2 to a full shank length depending on the size of the fly. I haven't had a chance to fish them but I doubt either of those guys would put out something that wasn't proven.