Nothing much too add on my build for the last three months due to work and home commitments, but I am back on it now. I'm making the frame and, as I have seen discussions on this subject, and I have shared Paul's pain as he battles with his bulkhead, I thought I would suggest these as alternatives to (the fiddly and time consuming task of) welding up the ends of box section.
They are cheap and neat. Squirt in some Waxoyl and pop them on. Lovely.
http://www.ebay.co.uk/itm/2712033140...84.m1497.l2649
I hope to be back soon!