How far can you copyright a schematic? When you use the similair cpu connections but redraw and redesign the schematic, does that count as a copyright or a CC license violation ? It is not a patent, so you not protecting an implementation.
I have not seen the schematics, so don't know how similar they are. But my feeling is that pinballSP does not violate any copyrights.
And certainly the PCB is his own work, so you can never claim copyright on that.
On the other hand I not agreeing what pinballSP is doing morally, but that is something else.