Since I'm planing on buying this thing, I almost feel obligated to try to further improve the design of the boards.
So I was looking at the pictures you provided and two things came to my mind:
- you should try to make it as low as possible. OP stated in the first post his goal from the start was to make a low profile keyboard, and I certainly encourage that. However, there seem to be few millimetres left inside that could be used to lower the plate even more.
One of the keys of making a low profile keyboard is a thin slab at the bottom, so I don't mind it's just 3 mm. More than enough weight in total considering the thickness of the upper part. However, feets seem to be placed on a thin slab and that bring us to my next point:
- feets are way too small and wimpy looking for such a heavy board. I mean, just look at this thing
Feets in general are known as the first point of failure on any keyboard, and this is why they should be generously sized. I don't want those tiny feet to unglue after 6 months of use. Look at Clueboard feets.
And then, finally, speaking of feets, placement is not unimportant. In this case, since Doro67 is basically just one giant plate, the best way to place them would be on a plate itself. This kind of design would provide firm, rigid sense of being anchored to the table. Placing feets on a slab brings risk of resonance and small vibrations when typing. I think it's a good idea to make an iregular shape slab that "avoids" feets on the corners of the case.