Another model I've just been sitting on: the Mk-LC10. It uses old fusion design's flycore for power available here: https://www.printables.com/model/286951-ofd-flycore-straight-talon-design-your-next-printe
Additional hardware includes my usual sheet-metal #4x1/2" screws, which also tend to be compatible with M3 or 2.6, typical flywheel stuff like switches and wire, misc springs/elastic, and that's it actually. The trigger has several options built in so you can adjust when it throws the switches, and the trigger pack is pretty cool - it has options for adjustable stops, tension via elastic. It uses the mini style and full size omron switches that OFD uses.
Regarding printing and assembly, the pictures depict the parts and for printing I usually do 4-6 walls and 3-7% gyroid infill. I have a prototype with 2 walls and 5% infill that hasn't broken yet though.
The author marked this model as their own original creation.