I started in September 2004! but I tend to do a lot of standing and looking, and thinking, rather than doing...
Things I would have done differently-
I would have cut the rear valance for the exhaust I'm using- not the one that came in the kit.
I would have bought AO48's not A539's (still gonna!)
I would have put the front brake calipers on the correct sides BEFORE filling the system with fluid!
I would not have worn baggy overalls while using my angle grinder mounted wire brush
Similarly I would have moved the bin liner full of old dog teddy's/toys away from the area I was welding in!
I would have had a bucket of water handy while welding (see above).
I would have started with a complete car, not a bare shell
Mostly though I'm very pleased with everything as I haven't had to make that many compromises really- I might put a carbon fibre front end/doors on it at some stage, and I'd like to put the new front subframe on that Chris now makes, but I'll see how it goes first.
If I think of anything else. I'll let you know...
All the best
D.