Bottom mounted Cannon for Kenner Speeder Bike ROTJ. I used a microscrew that had a 1.4mm thickness and a screwhead of 2mm for the fixing stud for conencting to the main body (2mm x 1.4mm x 3.8mm). I bought "1000 tiny micro glasses screw set" from EBay for this. I have added a block at the front as my 3D printer was drooping the end of the cannon.
As featured on Toy Polloi YouTube Channel!
This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/1jkImVRK9H5