I’m pretty sure the Netduino is never going to control my entire harness without some help. The Arduino (and Arduino Mega) have no trouble, but not matter what I do with the Netduino, its I2C buss fails after I get more than about 30 or so LEDs on the buss. So I’ve ordered a couple Darlington driver chips which I’ll try to use to drive the buss. For now, though, I’m sorta shelving the possibility of using the Netduino, as much as I’d prefer to use it. I don’t have too much time, and I need to be making forward progress.