Despite my decision to rebuild this board using a microcontroller instead,  I thought some images of the final product as it exists would be in order.

The bare board

I switched to long pins so there's clearance under the device for wiring. 

This version uses headers with male pins at both ends. In the next variant I'll use female headers with long pins and mount from the top of the board so that I can put jumper wires into the receptacles. Or, perhaps male/male jumpers with long pins at both sides? Either way it will allow for top connection as an option.