Thank you Wesmip1

I am not surprised by the profit being higher for non maidens, or the amount of profit.

Confirms my theory that in a lot of races the market prices are wrong.

I have been laying succesfully on Betfair for the last 18 months.

Without giving the System away it is almost taking the opposite approach to this!
The Backers could do well to follow the information gleaned here.
The key though to both betting and laying is discipline and flexibility.