yes the biggest issue is the bearings are junk from when they are new! we can use heavy axle grease and then the watch does not any longer "sound" fake or use the correct eta oils and have it be "in proper spec" and sound like a junky piece of poo.......i think that being replica watches, getting them more believable as genuine is more important than using the "proper oils" besides, do you really think the bearing will wear faster with axle grease instead of light oil? i think not......choose as you wish. yes, the rotor will spin faster without the grease....is that a good thing? vibrating on your wrist and sounding like a toilet flushing? besides, it only winds in one direction. when its spinning 5000 rpms on your wrist, it's going backward anyways and not winding............