I plan to build a modular motherboard with plug in modules, mostly thru-hole components, and I etch my own boards here at home. I intend to make every I/O pin from the black board accessible, even if many never get used. So now it looks like I need to research the pin assignments of the black board, learn how to configure custom boards in tunerstudio and start designing out a board layout that fits my needs.
I watch this thread regularly and will post occasional updates, probably in a separate thread. I just wanted to let you know there is at least one more black board that is working.