oh well I am going bump box on mine, just trying to decide on motors for now. Choice between a monster NR 528XR or a RB C5 for better drivability, both bs of course. I never had an issue with a ps ever and I rarely ever cleaned them so I must have been lucky. I did see that KO offers a top plate for the X1 that I am ordering that makes bs'ing much easier to line up cause it fits the chassis perfectly once installed. Should make it easier.