For anyone who printed the medieval catapult and found they are missing 2 pins and a handle,  here are the missing parts.   

I’m still learning 3d modeling so I’m not a pro designer by any means, but I printed these and they worked and will help you finish your catapult build project. 

After the first print the handles are a bit long, I will try to make a V2 and shorten and thicken the spindles.