Hi, unfortunately that was a very bad choice of words by Nick. There is nothing being emulated in the amp and there are no "modern construction techniques". The amplifier is pcb like the originals were although of course the pcb has been updated into a double sided one, with DC heaters and we corrected an issue with flickering relays that the originals had.
The amplifier is built in the same style of other UK Marshall amp with that type of conduction(AFD, YJM, VM, YJM...) and we also upgraded internal connectors, used cloth covered wires and a few other improvements which will become standard in new Marshalls.
The mains and impedance selectors were removed as they are becoming difficult to find and difficult if not impossible to get them pass modern safety standards.
We also added external bias points with two trimmers, one per push pull side.
Hope this clarifies the issues.