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smoothturn

I have been contacted recently by a couple of wealthy friends who love the races but have zero interest in doing the homework to have any idea on who to bet on and who to stay away from. They have offered to back my bankroll for a share of the profits. I have never done anything like this before so I was wondering what everyone thought would be a fair split. Obviously they assume all the risk as we will only be wagering with their money. 40/40/20? Any thoughts would be appreciated.