hello any one can help me i got a vandetta st by duratrax and bought a 1/18 micro brushless motor 2mm shaft and looking for the right pinion for my 48 pitch spur gear, i tried RR 1620 rc18t mini pinion .5mod and 1625 mini lst .5mod and both teeth was to small striped my spur . can anyone help me on this ./??? thanx