I started working on this project in June of 2014. The hardest part was programming the Integrated Circuit. The soldering and other mechanical parts were very straightforward and easy to do.
If anyone else has working hardware and they would like to contribute feel freeto message me the fastest way for us to collaborate at the moment is probably tweeting me @getreversed to initiate contact.
I am anxiously looking forward into the future of opensource chording hardware and software.