rodger, thanks for the Impco web address. I have found that one in the past. It doesn't really give me any tech info on Impco stuff. The only training or tech information seems to be a link for a colege in the US..............I won't get that trip past my boss! I feel I need to update my knowlege on LPG fuel systems as the last formal training I had was with Calor Gas in the UK.............a really good guy called Con Hanlon used to run the training. Some of the UK guys in the forum may remember him. Where is he now...........I think he was close to retiring in the mid 90's when I new him. I still use a Video tape that Calor produced, but it is well out of date. regards dave