Thanks Andrew, I'm enjoying this. I'm yet to build a combustion engine but when I do the Webster will be on my list.
Oh, by the way, I'm a draftsman and your drawings look fine to me - except for those funny dimensions """ :D.
Cheers John
G'day Gordon, I'm a long time user of Visual/Generic Cadd also but only a learner in model engine building. I've used Brian's method on occasions with success.
John