The main seal for the propellant canister was leaking on my CP88. I managed to get a new one for about £6 but replacing it meant completely dismantling the gun
I'm sure you'll all be as relieved as I was when it went back together and worked
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I like the way your OCD engineer nature has shone through and insisted you align all the pieces in a near parallel manner akin to an exploded diagram.
Top job! Pew-Pew!!!!