It was the size his team and the loft.I could not believe my eyes and the winning that lofts done at National level tbh, billy had told me hundreds times about how many birds he races and thought billy was at wind up lol for if you look back at all National races at 500+ you will see name D.Donaldson (Glassford) in about 90 or 95 percent the time in every race over 500mls with wee team man with 14 feet loft and none this £18 or £20 bags feed tae make them fly faster lol, and tbh don’t think there anything else could say about the man for what i have seen has opened my eyes up.