Early this morning I crimped DuPont connectors onto a pair of RJ9 jacks and glued them into the left hand slot box. I also added wires with DuPont ends to my reset buttons and glued one of them in place.

The newest revision of the slot box just came off the 3D printer late this morning with the MCU hole in the right place and the reset button hole moved to the outside wall.

Next I have to re-install all the keywells onto the new slot boxes and dial the offsets and splays again, but we're getting close to trying out I2C and seeing if they work as a split keyboard.