I read/watched the Martens piece and I came away with the impression that he uses braid backing because it lighter than mono or flourocarbon. He did mention casting lighter weight lures is easier because of easier spool start-up.I may be totally wrong, but I don't think a heavier spool has anything to do with casting distance. A heavier spool means that you need more brakes to slow it down. Casting distance is determined more by the rod, good bearings, lure weight and the ability of the person casting the lure.