try again, helm if you can show me how you did your repair that would be great I can get my head round how you made the seals just the way you did, as for wonky donkey looks like he has done what I had in mind I was thinking of somekind of plastic rod with an oring groove each end to blank the piston off so if mr wonky donky can give my any more info on that issue that will be great,not had time to see to rifle tying to fix car at the moment,so come on guys show me how you did it,by the way there was a article on some pisol forum where someone made a tiny polyurethane seal on a lathe also showed 3 o rings work on the firing valve as well,got myself a micro lathe just in case.