basically `plate-20200701-101209.dxf` with rounded corners (1 mm radius, added to pcb dimensions)
### plate-20200701-101209.dxf
plate as generated by https://kbplate.ai03.com
### plate-20200701-105048.dxf
plate with larger cutouts for stabilizers, also generated using https://kbplate.ai03.com, not used
### kezboard-pcb.dxf
back view of switch through-holes + cutouts for regular WS2812B leds, once used to evaluate whether installing them upside down to the back of the pcb would be feasible