I think the best and easiest way is to just plug in a I4C volt meter! They cost about $30 - $35 don't pull hardly any current themselves, are quick and easy to install and you can monitor them right up until you put the hatch on for flight. The I4C on board Digital volt meter is a permanent piece of equipment on board my turbine aircraft.

When you retract your flaps or cycle any servo in your airplane you can easily see if any servo is hanging up or overloading at the end points by watching the voltage drop and rise. The I4C shows voltage to the second decimal point. example 5.24v (very sensitive). It is easy to see if you are over driving a retract servo, flap or any servo installed in your airplane. As an example voltage will drop when retracting the flaps, but if you see the voltage drop even further when the flaps come to the full up position you know you've got a problem. Just go to your travel adj screen and back off the total travel, a little until voltage rises again. With a little practice you will come to recognize a high current drain servo easily. The most common problem servos are the ones like the retract servo, yes your gear work fine but are you actually overdriving the valve and don't even know it!! A small retract servo overdriving in the gear up position can draw more current than you think, maybe to to point of crashing your aircraft.
Lee H. DeMary
AMA 36099