Probably waffle on for weeks about things you could do before actually trying it. ;)
Have you run it yet or are you still building up to the big moment?
UPDATE:
So let the mini sit on the desk with the motors running for 20 minutes, all 4 motors recorded a temp of around 24 c
Then let it hover in the middle of the room for 20 minutes, and land.
All 4 motors around 32 c
So The motor feels and...
@Spoonablehippo welcome to the forum,let the drone hover for a few minutes ,then switch off and see if the motor that was tight feels any hotter than the other three ,if it does this could indicate a faulty motor ,or if you are lucky enough to...