Hello first post I was looking for a rear hub kit had a das-kit 28" 250w 36v which was brilliant was looking for another one however a broken greenacre cs2 has fallen into my lap; all appears well however it appears to be operating in a kind of limp mode it's crawling along when I use the throttle I was told it needs a new controller but surprised to find the wheel turns at all with a broken controller; looking for a manual or anything to run through some diagnostic checks is the controller in the hub or built into the battery holder ? Many thanks