The chassis is ... interesting. It is certainly lacking in the safety department. It is made of very soft aluminium that can easily be bent with your fingers. There is nothing anchoring either the mains input lead, or the high voltage umbilical to the keyboard in place. There is no grommet where the mains lead passes through the chassis. There is not a single star washer anywhere, meaning all earth connections could become suspect.

And now we flip it over and look at it from top. Note that there is no safety cage around the chassis. It is in easy reach while the unit is in use. There is a fuse in the HT circuit. It's position is the between the "0V" center tap on the high voltage (250V-0V-250V) winding, and the chassis, with serves as 0V and "safety" earth. If this fuse blows, the second end of the fuse, which is above the chassis is now at around 350V DC. Would this kill you? It might not get the chance, because to get to it, you have to reach past the two terminals on the HT filter choke, both of which are also at 350V DC, irrespective of the condition of the fuse. So is at least one of the terminals on the speaker transformer, depending on what else is going on in the amplifier at the time. Of course, if you break a valve/tube, they are also at this lethal voltage.

What does all of this mean? It means no way in hell am I going to do an authentic restoration. I can preserve the functionality/circuit, but mechanically it is getting introduced to the modern age!