Customizable Desktop Catapult

Basic desktop catapult design. Customize just about anything on it and see what combination of parameters sends a projectile flying the farthest. Play with the length and thickness of the arm, along with its angle from the ground and the diameter of the bucket. Adjust where the arm will strike the crossbar. Also customize the dimensions of the base, adding supports on the front if using a high armAngle so it doesn't flip over. Make predictions with your class, print what they think will work best, then give it a go!
Note, I don't have a printer and can't do any actual testing so I apologize if this doesn't function quite as planned.