The second printing of the chassis came out perfectly.

It meets my initial goals, but I'm already considering potential improvements. Isn't that the way of prototyping? Truly, I have gone mad with power. 

1. I can add full-depth cutouts to the back (and side?) of the chassis right above the metal plate. This would facilitate cleaning with an air-can, as well as let the RGB backlighting show off on the sides and back of the case.

This isn't a feature for everyone, I can see how it might be considered too gaudy, but I don't think anyone would complain if I release multiple variants of my chassis.

2. The sanded 'finish' on the side of prototype 1 has some uneven coloration. I suspect it was caused by sanding with paper that had white and green paint on it. I'll try wet-sanding prototype 2 without any paint on it, and see how that turns out.

3. The layer lines on the front edge of the chassis are particularly deep, despite the use of supports for the second printing. I'll make sure I sand this particularly well to get the kind of finish I want. Otherwise, I may have to re-design that part of the chassis to support a more even finish.

Next steps:

1. Wet sand Prototype 2

2. Install the 21 M3 heat-set brass screw inserts [Query: M3 heat set screw insert 5mm]

3. Attach little rubber feet (still not sure what I want to use for this).

4. Install the Wooting He60 keyboard module.

5. Move on to the Modular DOCK component.