i think the dremel would be too "agressive, especially if you leave it on one area too long.....kinda like sanding a car or a boat for painting, if you don't absolutely know what your doing, you could accidentally leave it in one spot for too long and gouge the paint in the process.....in the case of this motor, if you use a dremel and leave it in one spot for too long and pit the mating surfaces, you won't have the factory-fit and tolerance......you might end up with a loose, sloppy motor or leave a gap/loose-fit and end up leaking oil.....why chance it???....go with the s.o.s. pad's, keep them wet and let the soap do the work, if you run them dry, that's when the begin to scratch the metal......i think you made a wise decision going with the new bearings, why chance locking up the motor in mid-air for the meager price of the new bearings, in this case just $13.00......i don't know how long you been flying????.....for a seasoned pilot like myself, a dead stick is just a walk in the park, i could thermal around the sky forever.....for a newer pilot with average skill's and only one plane to his name, it would not be worth stuffing it into the ground over the price of a set of bearings???.....also keep in mind, from a safety stand-point, it would not be wise or sportsman like to put a plane in the air unless you are 100% certain it is airworthy......i know i alway's check my planes at home the day before i fly and at the field before i fly.....flying is cooool, accidents are not......KOOLKRABBER47......

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PRECISION AEROBATICS BADBOY V2 O.S. 46AX WITH STINGER 12x4 WOOD PROP JR XP6102 COMPUTER RADIO