I have had a few guys at loft recently an one in particular commented on me feeding beans to my national no hope,rs my words not his he said you have no chance winning these days feeding beans . So I looked up the gold cup over the years , From 2005/2015 When the more modern feeding methods would be in place , over the 10 year period the average velocity is 1214 ypm Then compare it with the years 1965/1975 when beans were the main feed the average velocity is 1310 ypm Even 1950/1959 the average velocity is 1176 so not a lot of differance . So I say sod your fats/carbs just feed beans and fly natural . Good luck all tomorrow .