Thanks, that answers my next question as well! (Can I drive all 15 sense points from one pin set?)
My last question is on the circuit design. Should the resistor be on the high side or the low side of the sense pin when taking the reading? It seems to me it should be on the low side, but the how-to I looked at (and thus the example) has it on the high side (d1 high d2 low for reading, d2 high d1 low for reversal).