Not sure if this was mentioned earlier (I didn't read previous posts), but one critique on the PCB is that the "+" and Enter keys on the numpad have their switch sockets in the regular orientation, which makes it a bit tricky to remove them with your regular switch puller; I just ended up using some tweezers. Typically, this is addressed by turning the sockets by 90 degrees. Not a big issue, but just something to consider if you decide to do a revision 2.