Nice catapult lad ? I prefer aluminum frames, they hold up for better against fork hits and no recoil with double/triple bands. Highly recommend the ranger ergo ??
(Made a DIY catch box which I've added an image of the completed deisgn. I used a carbon arrow shaft to go in through the top about 5cm from the top the whole way through till the other end which allows me to hang a few t shirts and a towel inside the catch box which helps to slow the projectiles when they penetrate the target plus I added a few extra layers of cardboard at the back with heavy duty duck tape and she hold