Thanks for the advice again, I'll definitely try to get it back on the road and have a look at the electrics frist.
Anything above that I'll send it home for a rebuild - I've a large collection of special tools for Vespa's which have only been needed once!
That's also for cutting me a little slack on my capacity increase question, as you quite rightly say, the main point is to get it back out on the road!
I'll try to post a before and after pic, but it might have to wait until I'm home for that one...
Thanks for all the good advice, it's been very much appreciated!