The car build was the easiest I've ever done. Everything fit perfectly with absolutely no hand fitting. The cars drivetrain is super smooth even though it's brand new. I'll post a setup after I find one to my liking. I've never built a BJ4 but I have driven one. I will be sure to let people know how this drives. I dropped in a 9x2 Reedy Ti with a V2 endbell kit, more then enough power....I drove it up and down my street to set trims and it was damned fast, nice and quiet, really responsive. Can't wait to get it dirty.