I play 4 bl motor b4 novak lrp orion trinity, modify 3.5-4.5, run very well , no maintance, always work like new. only novak broken once(claim a new one).
I love bl , it is the evolution of ep car.
my friend brought lrp eraser b4 have same problem. I think it is a indepentant case.
don't go back to brush motor , it is no future.(except 540)