This is a fun print that is ready to shoot the moment you pop it off the bed! No assembly is required! Easy to print with no supports. Make sure to have it positioned on its side as shown in one of the pictures. Choose a flexible filament such as PETG for best results. ABS and PLA do work, however they will bend a little after some use, as you can see in the pictures. If you do it right, this little guy can shoot something 200-300 times its length! Jelly beans, peanuts, and anything else in that size range works great.
Make sure you have the wall thickness large enough so that the arm of the catapult is completely filled. Otherwise, you can crank the infill to 100%. It is also a good idea to print with a brim for good bed adhesion. Make sure to print the ball on one of its flat sides.