Hi, This is my first post on the forum but I have been reading for a long time. I have just made my first slingbows. You can see them in the images below. The first one is the smallest and the first that really worked. All of these are just prototypes and not finished. I use black theratube on all of these. Second one I made with the Jörg's plans and at the moment it has more speed than others. It is not so comfortable to shoot and I think those thera tube arrow quides are destroying the fletches. Maybe I will build a bigger one next. I have been able to shoot the smallest one with carbon arrow 44 m/s its about 144fps. Zombie slingbow did 57 m/s and its about 187fps. Speed has gone up but I want more I also did one version of Jörg's 120lb bow but it did Shoot the arrows strangely up? I have never shooted with a "real" bow.