Hi Joerg and friends, I wanted to make a lightweight frame from carbon tube so I used a couple of my old broken hockey sticks. I call it the JG940 after my venerable father Jack Gamble (who suggested I use carbon instead of steel tube) and the 940 represents the extra 940mm of draw length. It is pretty powerful. Pretty simple in design but very sturdy and it has to be for all the extra forces at maximum draw. The bands were roughly cut the whole 940mm length tapered from 5 inches to 2 inches. Mr. Sprave, thanks for the inspiration. I'll try to post a youtube video of me shooting stuff with it on my youtube channel (An Evolving Ape) in the next few weeks.