So I finally got the SuperMID working today. Turns out it just needed to be reset, but the reset "button" wasn't working. So I just desoldered and removed it.
Since the reset button just shorts the +5v side of the main PCB to ground, something I quickly figured out I could accomplish with the judicious application of a screwdriver or key to short out said points.
Anyway, back to the main point...
It WORKS!!!!
kinda...
I'm getting a good vss signal to it, but the injector signal isn't registering. I've only tried the wire for injector #4.
Oh well, I'm getting closer by the day. One of these weeks I ought to have this thing up and running properly.