I believe it does. I'll have to check it out when I get home..
Should I check the voltage across Batt+ and GND with and without the blade in to see what's what? I'll do clashes, blaster, lockup, etc.
Yes, measure across BATT+ and GND. The idea is that if the battery voltage goes down very briefly when you do stuff, the multimeter MIN function might be able to show you that. Depending on how many measurements per second your meter does, you might need to try many times though. IF you see some low values, it would indicate a weak battery, cables or recharge port. (Basically, something has a high resistance somewhere...)
Could I also measure resistance from the RC port to the Batt+?
Sure, measuring resistance through components and between components may help you find problems. Connectors and wires should generally have very low resistance, and if you see anything greater than 0.1 ohms, it will probably require some fixing.