Thught about it..figure I'll make up my mind the next time I have to take the rifle to pieces.
Do like the feature, use it on the .177 version earlier than most would...once I can detect the fall off, tend to dump the CO2 rather than shoot. Same with the ones without the keyway release, but i just hdry fire the thing until pressure drops....much prefer to get it over with quickly.
Good to know that if I foul up the job, a replacement tube down't cost an arm-n-leg.