Welcome along, in terms of specialists in the Farnborough Area I don't know of any. Many people on here say great things about Abbey Motorsport and Horsham Developments both are roughly an hour away. I suspect you're talking about TGM in Fleet when you're talking of the Honda specialist. I have heard they can take care of 350s as well, I have had a couple of friends of mine that owned 350s recommended them to me but I am yet to use anyone as I have only had the car a couple of months! Good luck in your search!