Slugger Self-Propelled Cannon

I'm working on designing up various ‘80’s toy lines all in a single scale. I'm going with 1:60 to be Diaclone compatible. This model is the GI Joe Slugger. I've included all the features of the original except the opening engine cover. The cannon moves up and down, the backstop/stabilizer will extend out and angle down into the ground, the hatch opens, and the wheels turn. A Diaclone figure will fit inside the opening, but he cannot be seated in it and the hatch cannot close with a figure in. Pieces included:Body stl - contains the main body, hatch, hatch pin, and rifle (need x1 for the full vehicle)Hatch stl - contains just the hatch in case you need to print it separately (only need if printing replacement, or if one from body.stl did not print correctly)Rifle stl - contains just the rifle in case you need to print it separately (only need if printing replacement, or if one from body.stl did not print correctly)Cannon stl - contains the main cannon (need x1 for the full v