HI James I have tried to contact Rob Lane who set the reg up initially and re-sealed the air tube but unfortunately his phone is on an automatic answering recorded message saying that he has ceased taking airgun related work calls due to an accident. I think that is going to be a dead end. So I am now pursuing other alternatives. Many thanks for all you guys out their in the forum for you replies, I am now much the wiser but less in wallet thickness. All the best Mickey