I've never seen a gasket for sale, hence me asking but I could make one easily enough. I'm not sure if it has a pressure relief valve built in, I'll have to look at it. The problem is, I've put it in one of my many landy parts storage areas and I can't find it currently. What happens in my house is this; I order a part and it duly arrives, I open the box to check the part then I leave it in the hall ready for me to put it away when I next go into the garage. If it hasn't moved after a couple of hours the wife says "I hope you aren't planning on leaving that there". If I haven't moved after a couple of hours of her saying that, she bloody hides it somewhere and swears she hasn't touched it. After a week or so, I can't remember if I've moved it or she has. I must have hundreds of pounds worth of parts currently on the missing list. I bought a hand throttle a couple of years ago and I have no idea where it is now.
Col