Well, I sought the help of a local man in a shed (friendly amp technician) and he sorted out the issue of my dead Deluxe. Apparently I had wired the Zenner diode on the VRM the wrong way around - I wasn't aware there was a right way round?! He tidied up a couple of solder joints too. Other than that, he said, "it was good work," which I felt pleased with, since it's my first amp.
Sounds great, really lush and vibrant. I've only had a quick play, so haven't investigated the full range of the sounds. The VRM works really well, but it's still a loud amp! Will post some build pics if I figure out how...
A collective thanks to everyone on the forum that helped me out with all kind of queries along the way, from soldering tips to speaker selection!
cheers, Rich