you never now if your on the right gear ,, or you should have done somthing else,,  next time  i will try the 1  ,, i used the 2  thinking that will be ok ,, and it was ,,,, but you still feel that it should have done more ,, it was not easy getting these speeds and in places it was  tarmac flat  so im mystified but exausted   and climaxed  ! would have liked to have got  a 21 on me alpha but  i think it will only work on number 1  and small sail and  shit loads of energy