Hello Peddy thank you for your interest. There is a loss of Co2 from the 'loading door' when the pistol is fired, I have an idea for stopping this but if I were to cock up the mod then a new door would be needed. Plan was to get a spare just in case! May be some other things as well, depends on availability.
I know its not exactly a major thing in the grand scheme of things but I just find it annoying.
Same with the .455 Webley and Schofield that blow. When you have only 2ft-lbs to play with every bit counts.
I do like to 'fiddle' with things, I really must learn to stop but at 77 years then what the heck.
Cheers.
Geoff.