I modified my old JPC to accept AVS flaps and following that I started making some custom flaps. Here's a 1.0 version of an S&S Precision GRT mated to the JPC. I basically built a sleeve from 330d cordura to slide the base plate into and sewed the attachments like an AVS flap. Works great so far. The next version will be a little bit nicer but overall the same concept.