Hi Beezageezauk and many thanks for the comprehensive reply - most helpful

I've got the Beezer manual which lists the various carbs but doesn't mention the 7 degree tilt option - having bought a 376 on someone else's advice and found it doesn't fit (like many of my other purchases) I didn't really won't to plod out more cash on another ornament for the mantle piece! But you've confirmed what I've read and discussed elsewhere which is fantastic - now time to place that order for an early Xmas pressie!
Should be breathing life into the old girl again soon once I get the carb.

Many thanks Beezageezauk - your reply is much appreciated as is A10gf's.
RR