TK , Thanks for the advice. It magically started running normal, it was quite a relief to see your name on screen! So, to future users who experience this problem, jiggle the wires a bit. Turns out my wiring was correct. Having none of my other modules connected, it's constatly sending out midi messages, since nothing is grounded. That means everything is good! Time to finish those ribbon cables! And more pix soon. Cheers, Jason D