tony.with your weight rule wouldnt you be excluding the best horses in the race.for example.-50=0.1 pc of runs=0.1pc of wins.50.5-51.5=1.4pc of runs=0.7pc of wins.52-53=34.8pc of runs=21.3pc of wins.its only when the horse reaches 55kg up is there an advantage.in fact.runners carrying 55kg up account for 36.5pc of runners but provide 50.6pc of winners.the point being that lower weighted horses(contrary to popular opinion) have an appalling win record.