It would be very difficult to work out if an app. contributed greatly to any particular loss or win in a way that could be reduced to +/- for a system. There is some very good app. around and like the top jocks, they have their share of good and bad rides. Some systems and form students ignore app. weight claims with the logic that their lesser experience and strength cancels out the weight claim advantage. A bit of a blunt rule if it's applied to all app. in all races at all distances.