Hi All Solved the problem with the regulator tonight. Half an hour with some emery cloth followed by fine grinding paste has created an almost perfect seal. Almost, as air seeems to be more searching than steam. I used silicon sealant to block the passages and was supprised how easy it came out with a bit of air pressure, quite a satisfiying pop! Thanks for the suggestions. Andy MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.