Honestly man... Until recently, there hasnt been much love given to chops here. Not that anyone was against them, but this is primarily a cafe based site. In fact, 75% of the hardtail bike you see here now, have shown up in the past few months to a year. Build a jig, and start poppin em out for folks! The big problem is that you cant just make a rear hardtail section that you can weld onto a cb frame. The stamped backbone (and other bits) needs replaced or modified as well. The easiest way is to build a ground up frame for them.