OK I know, but it’s a start.
3mm acrylic is bendy, so I reinforced the back with 1.5mm aluminium to make it much stiffer, but it’s still not as solid as I’d like it.
I should have really made the metal plate wider than I needed on one side, and bent it up to form an L-shape to totally stop the bending.
No chance for recessed jack sockets like on the original, my metal working just isn’t that good. 4.5mm panel depth is really the limit for these jack sockets, and it’s borderline for rotary pots.