[Enhancement] Machine bottom so downward tilt is possible.

[LennonConson]

The magnetic tilt bar (PN-000174) can only be applied for upward tile. It would be nice if a downward tilt could be applied by attaching the bar to the front of the chassis.

To see what I am talking about see this reddit post https://www.reddit.com/r/Ergonomics/comments/l2d9w5/reverse_tilt_keyboards_theory/