Sparky12, I would presume you are selective in the type of race for your strike rate of 68% and POT of 21%? and you are betting level stakes?

One of my friends had a friend who worked for Mark Read. He said that M.R. would total his assessed odds/percentage of his top three selections, and if he could get those odds or better he would then have a bet. For example, if the assessed total percentage of his top three selections came to 65%, and if another bookie/TAB were offering odds on those three horses that totalled 65% or better, he would then back all three horses. However my friend does not know if M.R. would juggle the amount bet on each horse or whether he would use those as suggested by his ratings.

I agree with Bhagwan - I would not be too eager to change anything yet.