I'm back. I am the OP but lost my original login info so I just made a new SN. The cocking tube assembly is not complicated at all. The G3 tube insert and lever are unmodified and the shortened AK piston has an angle ground into the leading edge to ensure it doesnt jam on the back of the insert. This thing kinda works now. It will feed and chamber individual rounds but not while firing. I think it needs to have a ramp cut into the bottom of the chamber like a semi-auto pistol. The chamber is currently fully supported so a little bit of a radius will probably be ok. I only test fire it at my ranch, (which is 5 hours away) so progress between test fires and modifications has been SLOW. Going on three years slow... If you want pics of anything specific, let me know.