has anty one got any hints or reading material on tuning a single weber on a bay window kombi apart from the vague intructions sent in the kit.

I take it you are talking Progressive??

read these

http://www.redlineweber.com/html/Tech/Table_of_contents.htm 

http://www.aircooled.net/gnrlsite/resource/articles/jetting.htm 

What are you having trouble with??

Are you right with you jetting???

Barry