The energy pack is sized to fit ¾ inch outer diameter cables. The energy pack can connect to the gun with ¾ inch super magnets. Print any file that has x2 in the name twice and use the hexnut file or ¼-20 7/16 hexnuts for alignment. 12/28 changed a chamfer on scope 1 for better print quality and added a missing alignment mark on the back stock.
The author marked this model as their own original creation.