Here are the schematics for our main board. Pretty simple design based of the Arduino Uno. All the pins are using the Uno's pin labelling in this schematic, but not the pin numbering, be aware of that. You can also use a CNCNano board to replace these electronics, but they'll have different pin mappings... but should be pretty easy to duplicate the board if you wanted to.
More details coming soon. There are no restrictions on using this (simple) design... it's now in the public domain.
Bill
can i use this kind of board? if so. can i burn the firmware and bootloader directly to the nano board? where would i plug in the oled if ever i opt to use one?