Also... a I designed a helper PCB to replace the proto, base shield, and one relay pcb. PCB is completed and Im waiting for it to arrive (soon). Schematics are available here. I will update the repo to include the pcb files when the pcb is tested. You can purchase the assembled PCB here after everything is tested.
UPDATE: Testing done. I decided not to sell them as kits due to the surface mount component size (0402) and other very small parts. At $19.95, it is a reasonable cost considering im not making 100's of them.