**narrowed it down to brushed motor with fwd brake and reverse like
the Metronick Viper RV 11,
i would stay away from this,its the worst speedo iv ever had and is not worth the money,its got no brake only initial brake,after that it just free wheels,i would spend a bit more on a second hand lrp sphere,if you can find the 2007 version they are very good for the b4,thay still sell them new but the new prices are silly,
good luck and have fun