More info here:

http://www.40percent.club/2017/10/unquadquad.html

BOM

144 1n4148 diodes
144 MX compatible PCB mount switches
1 Arduino Micro (not Pro Micro)
2 17pin headers or 1 40pin machined pin wide socket

How to order PCBs from gerber files

EasyEDA ordering info:

PCB

Gerber: unquadquad.zip

233.4mm Max* 233.4mm Max;
Layers: 2;
PCB Thickness: 1.6mm;
PCB Qty.: 5;
PCB Color: Green;
Surface Finish: HASL;
Copper Weight: 1;
Panelized PCBs: 1

Mini Top Plate

Gerber: 12x12minitop.zip

76mm Max* 76mm Max;
Layers: 2;
PCB Thickness: 1.6mm;
PCB Qty.: 5;
PCB Color: Green;
Surface Finish: HASL;
Copper Weight: 1;
Panelized PCBs: 1

Files released under https://creativecommons.org/licenses/by-nc-sa/4.0/