...and it's a hunk of steel that must weigh a few tons and is built to withstand an extinction-level disaster. I mean, even for the '30s, it seemed a little bit excessive. I understand it had to be somewhat heavy for stability and all, but I suspect it could have been made more lightweight.
> I suspect it could have been made more lightweight.
Perfection is the enemy of done.
Those are the kind of improvements that happen when many items are made. I suspect Disney only made a few, and thus what was more important was creating a working multiplane camera than lowering its weight.
I also suspect that the weight added a lot of stability which prevented shaking between frames.