Just to satisfy my own curiousity re the RMS vs Average on the DC range, I dug out some gear and had a play. I figured an 8kHz squarewave with suitable DC offset and varying duty cycle would would be close enough to what would be measured across a shunt. It turns out that a Fluke 175 (and probably every other meter) on the DC volts range measures Average voltage, not true RMS.

What does that mean to us?

If you measure the voltage drop across a 0.001 ohm shunt resistor where 1millivolt = 1amp, then the displayed value will be the average current which is useful for determining how fast you're draining the battery and how much electrical power is going into the motor. What it doesn't tell you is how much you're heating up your battery, esc and motor windings because it's the RMS value of current that decides that.

eg for ~142mV peak
25% duty cycle gave 36mv average and 73mv RMS
50% duty cycle gave 71mv average and 103mv RMS, with a boatload of assumptions to simplify things, at 50% duty cycle you're motor is producing half the torque (half the current) but the windings are heating up like your passing 73% of the current.
Note: The RMS values are calculated as Fluke 175 don't return true RMS values for squarewaves or high frequencies.

OK, it probably makes no difference to anyone here, but it's interesting nonetheless, especially to a student a couple of weeks back that couldn't figure out why 6 amps DC (average) from a mains powered 1/2 controlled rectifier didn't heat up an element the same as 6 amps (RMS) from a Variac...