[Qbranch]

Sooo.... tiDSP, Freescale, Atmel, Microchip, etc.?

aka, what processor is that?

I don't understand what you mean by 'no decrease in update rate'. If you have more data comming over the same line, it will take longer for it to come through, unless you double you're baud rate each time you add another box. (double the data, double the rate = same time. double the data, same rate = double the time)

Did you guys design the PCB? If not, where'd you get it from?

-q