Of course there must be plenty of money made from laying with some inside knowledge. I also feel you can make decent profits without the inside word, just thorough form analysis and responsible staking plan. I think this can only be done consistantly by laying false favourites, or vunerable favourites at short odds. If you have a strong selection process, that can pick losers 80% of the time instead of 70%, even with an average price of 3.50, you should make tidy profit long term. As for harness, if you can get short odds of a notorious breaker, then you are doing well. You are then still at the mercy of chance. But you would probably have a good edge long term if you stuck at it and kept tabs on things as you say you are. Good luck with it.

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All generalizations are dangerous.