Ok I have been making sabers for a while now, I have a machine shop with three big CNC mill lathe combos so I am currently working on a thin neck Luke ROTJ. I decided to incorporate a built in LED holder heat sink and a emitter twist blade retention system. The emitter will bottom out at the choke, inside of the emitter there will be locking retention system that will grip a blade when the emitter is tightened all the way down. I have the prototype already made just finishing the rest of the saber. I will post as soon as get a working saber ready. ask any questions you guys may have, but I will not describe the retention system other than its a twist lock built into the emitter.