@yveaux thank you for letting me know about this great project! The thread is also very useful.
I managed to find a relatively quiet range in channels.
@kristof-delaere
The terms that you refer to are footprint/package specifications (size, shape).
Here are links to the above components on digikey:
CMOS SMD (oscillator)
http://www.digikey.com/product-detail/en/epson/SG7050CAN-27.000000M-TJGA3/SER3999CT-ND/5175091
0207W (120 ohm resistor)
http://www.digikey.com/product-detail/en/tt-electronics-welwyn/WRM0207C-120RFI/985-1466-1-ND/3648019
0207W (2.7k ohm resistor)
http://www.digikey.com/product-detail/en/yageo/MCP100JR-2K7/MCP100JR-2K7-ND/2169183
@fets So far, I have only built the 5x5 board (but the others should be schematically identical). The only issue I have found so far is that I cannot get the ISP port to work. But I have checked and I have an identical setup on the 1.0 board and that worked, so I suspect the programmer is too weak to drive the net on this one. So it is not a board-issue per se, and might only be an issue on the 5x5 board as routing is the most complex on that one due to the size.
