how come you needed to replace the bearings it was my understanding that castle use very good quality ones.

The problem with the mamba motors is that there not as efficient under partial load as some of the german motors.

I know that with a xxxt its a pain to get a heatsink on the motor but with my plett extreme without a heatsink and just a fan the temperatures are quite good.

I know that a lot of these feigao motors that companies like Orion, mtroniks, trinity etc etc are selling have built in fans but to be honest the efficiency of feigao motors offset that cooling advantage.