I have the robo BK set up (pinball PCB mpu, driver, power supply). I had a matrix issue with the Rottendog so I went all in with these boards. Problem solved... for a hundred games or so. I'm back to having issues with any switch in column 6 locking their respective row on. I used a switch matrix tester to eliminate the playfield from the equation and they're still locking on. Pretty stumped while the Knight laughs in my face.
Well-built boards (esp the power supply), just a shit Black Knight.