Thanks to everybody for their comments/suggestions.

I can see it will soon be time to take up my soldering iron...

Robert.

--
|_) _ |_ _ ._ |- | So what? It's easier for me, so I'll do it!
| \(_)|_)(-'| |_ |
deadspam.com is a spamtrap. | What's wrong with top posting?
Use bcs.org.uk instead. | It makes it hard to see comments in context.