Good one Bagman, nothing like a good 'theory' :-)

I'd like to see that little lot worked out and done 1 min. before the jump. And wow, now I have the bets on, look at all the SP prices dramatically changing on the horses I'd so carefully worked out the correct betting ratios for [heck, my bets in total are now well into odds-on as they jump] !!! . Ho Ho.

On a more serious note, yes you could do that on track with the bookies [not on the tote], but If I handicapped a race and came up with 3 good chances [if 4 i wouldn't bet the race], why not just take the best price on a single bet? The money saved would be used on more of the same in other races. Your bets are going to get up enough to come out in front unless your handicapping is way out of wack.