[morzh]

Arran

All parts are steel.
Yes, I can possibly to it. It is 3 parts. And I do not think I have to bend the edges of the main part. The parts can be riveted together, which is what they are.
Of course, aluminum will develop the oxide and become less of a shield over time, but if riveted well, maybe it is not much of a problem. Or at least during what I have left of my lifetime.

I actually think, the vertical parts are more important as they separate the partitions from influencing each other, whereas the horizontal one is simply the carrier of them, as there is nothing that needs to be shielded from the underneath space.

And, yes, I possess the skills and can use our workshop to drill the holes (I do not have a good drill press at home), it's just I am not a big fan of this type of jobs. Oh well, first I will have to deal with that first radio. And maybe the GE. Then I will take on the last 140.