I saw what appeared to be a factory chopper. It was hard to get at where it was and I didnt have my camera but the guy is going to try and get pics. Here is what I saw. Under the seat looked similar to a BIG Bear Scrambler loop. And the sissy bar went down and formed a loop that was a 90 degree to the upper part so it went around and behind the rear wheel like a bumper almost. I have seen the loop on non chopper frames. Maybe that is a starting point. Any thoughts?