I built it off the '88 schematic from Marshall. The board uses the Dreamtone layout (which seems fairly logically laid out.)
Sounds great! It does a great clean, different to my 5E3, but still good-sounding. The master works like I hoped it would, I can get good-ish crunch at low-ish volumes. It still sounds best wound right up with the KT77's working hard! Apart from no bright cap, it's a stock copy of a '88 JCM800.
Fixed a few boo-boo's since the photos (put the NFB on the 8ohm output tap where it belongs, and fixed the wiring to the mains switch so it doesn't stay on all the time.) Nothing major
Thought the ground buss Ceriatone use looked like a good idea, so I used it. Very convenient for soldering grounds to.