Madgambler, not trying to live up to my username here, just offering constructive critisism.Your basic plan is ok IF that S/R etc. carries on.(you are betting Maxi-divi or top fluc there I presume?) with some tuning it could be a winner.

Lets say it does, so over the next few years you will have had say 200 bets @ 1 unit, with a S/R of 25% etc, 200 bets @ 2 units with aS/R of 25% etc, say 180 bets @ 3units with a S/R of 25% etc etc etc

You see what I'm getting at the S/R and the Ave. Divi stays the same for each group in the progression, the horse you back @ 9units has no greater chance of winning than any other. it still has a 25% chance.

So in other words you may as well just back em all at level stakes (slightly higher stake)