I think LRP motor and Novak motor are almost the same......and they can be share to use but i would recomend to use as a set.....must be better than mix and match.
but dont buy low end LRP motor......they are crap......cannot not repair bearing !
X11 can replace bearing......the other cannot like Eraser...unscrew the screws is ok to replace the bearing !
and when do u need to add bearing oil , running it on DB should be better then running on DF.....but if I were u add everytime after u play. just to make the bearing long lasting
oh one more important thing is never or try not to run the motor full power without loading....thats hurt the bearing !
.....成二百銀呀....好狠......貴呀