When to replace motors?

I'm not winging it. Keep a flight log of every flight, and am calculating the motor hours from the total flight time.
 
[QUOTE reelcrazyfish, post: 111751, member: 8664"]Are you planning on replacing motors at a certain hour mark?[/QUOTE]

Planning on swapping in a spare set of motor pods at 50 hours, then putting the originals thru some testing (balance, rotational friction, resistance) and replacing bearings or motors as needed.
 

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