I have never mounted it and I don't know if previous owner did either. I can't use it with my blue flame exhaust since it mounts to bottom of undertail and I didn't want to make any holes in the piece.
I had the blue flame mounted when I was using my stock undertail. You would have to make holes in order to use the hotbodies undertail with a blueflame highmount. I have personally never mounted the hotbodies undertail. Yes I still have it in the garave and it is still for sale.