F2K Trebuchet

This is an f2k style floating arm trebuchet. My son loves launching stuff with this thing, but he needs help loading it. For office wars it can be adjusted to launch objects high over cubicle walls and vanquish your opponents. One of these days I'll post a video of it.

The frame stands about 8" tall by 12" long. It can easily launch the small golf ball included in the files a good 25-30 feet with the right sling/pin and counterweight. This must be printed in pieces and assembled, with some hardware and other items required for assembly. Press fits are designed for 608-2rs bearings.

What to print:
Base_front 1x
Base_rear 1x
Frame parts 1 of each (4 total)
Arm 1x
Top pieces 2x
Trigger shaft 1x
Trigger wheel 1x
Wheel 1 1x (optional)
Wheel 2 1x (optional)
Wheel 3 2x (optional)
Wheel 4 2x (optional)
Ball As many as you want (optional)

What to Buy:
M8x150mm threaded rod 1x (I used th