ive been researching this forever and still cant seem to make up my mind on which freecoaster i want. both the nankai bamboo and the alienation v2 seem like good ones but for different reasons. first off the alienation has externally adjustable slack and a 14 mm axle which is good bc i ride mainly street. on theother hand ive heard that the bearings will blow out very easily bc they are sealed. i was told that i should go w a nankai bamboo bc it still has the 14 mm axle but is unsealed so it can take more of a beating especially if i land sideways. however if i get unsealed i cant tighten up my back wheel as much, so it will keep getting knocked out of place when i grind. has any body had a problem w their alienation bearings? which should i go for?