Summary If some BLs or motors are hotter than others; 1. Was there wind? 2. Check your CG to see if one or two motors are compensating 3. Check bearings in motor to ensure smooth movement 4. Check solder on the BLs and reapply if needed. 5. Replace BLs of the hotter than normal motor/BLs. (Replace the capacitors and keep used BL as backup)