Thanks for your help guys.
RE the gearbox problems.. We bought the Boxster from Virgin 911 a few months ago, and during the Sales patter they told us we wouldn't have to spend a penny on it, it was in such good condition. It had just been serviced and the last guy spent thousands on it etc etc. I signed the waiver saying I didn't want the warranty - what was the point? It was in such good condition!! (I know, I know). We started hearing odd noises during gear selection, and the occasional clattering noises when driving, but we pretended there wasn't a problem because it was new and we didn't want anything to go wrong. Then we did a track day as part of the build-up to the 'Cannonball 8000' rally we're doing in September in our old 911. I only went out on the track a few times before the noises started to get worse, so I decided not to continue and drove home. The next day, the gearbox had completely seized up and it had to be towed back. Jaz did the work in the end and replaced the gearbox, flywheel, and clutch. Virgin paid for just over a quarter of the work in the end, claiming that the fault was down to me track daying it. I think that there was something intrinsically wrong with the car when we bought it, although I admit that the track day accelerated the failure happening.