After I found the really cool looking Rubber Band Gun from KAZKIN, I soon realized that I must have such a thing. But can't buy one or get the right plans to build it on my own. So I've tried to make my own cool Gun, for the normal "Monday morning office war" And of course for my son :-)))) I'm sure most of you don't need any advice, but you should make all Parts as strong as possible. That Thing is almost complete printable, you just need a small Spring an two screws. I made the holes for a M3 screw tap. The bolts are intentionally a little bit too long, cause you have to correct the upper/lower edge after printing and it's easier just shorten them. Sometimes you have to care about the edges of the holes to, depending on which PLA/ABS and/or Printer you use. i hope you enjoy this Toy and publish many pics of your own copy. Just by the way, the Chassis is about 6 hours and the other Parts are 3-4 hours printing time. But it is worth it...I've added the frame as individual files and even a new slightly larger med sitze Frame, also single Files for left & right.