I just wanted to note that in the data files (in ours, at least), even though the column heading says "tachometer (RPM)", it is NOT in RPM; it's in V. You can convert it to RPM by multiplying by the Tachometer Gain (310 RPM/V).
Also, our PID controller data files have the labels "Target Speed, R (RPM)" and "Proportional Gain, Kp" switched, so watch out for that as well. It shouldn't really matter and it's easy to tell they are switched - but I thought our group had screwed up the input into the program at first, so it might be nice just to note it for anyone else wondering.