This mod looks nice but that's where the pros end. The Magneto I recently purchased is much more bang for your dollar and quality. The Chi you clones are personal injury law suits waiting to happen due to the short and shoty post threading and lack of basic insulators. The firing button just plain sucks. The inner tube is so tight that I couldn't fit a protected 18650 through it without porting the tubes out. FYI the real Chi-you seems to be built very close to the clone. They both lack a bottom button insulator, have the manditory short throw and the same locking ring that should've been a reverse thread locking ring. I for one am glad that I got my hands on the clone. If I had purchased the real deal and found such simple things as no insulator on the fire button, I'd probably flip out a little for wasting my money on beautiful crap.
The original Chi-You design did not have an insulator on the bottom button much like the Caravela as MNKE and SONY batteries were not in heavy use back then. A simple o-ring can fix this. .. As for reverse threaded lock ring. Ohh well.. deal breaker condemning a high end high priced mod to utter crap? I'm glad you got a clone too...
-CF