they are used to get material into a tighter feeder house like 66 series. probably need to take off for 88. wider feeder house needs wider pattern. opposite for fingers. need more for wider feederhouse.
FlIGHT EXTENSIONS WERE USED IN SOYBEANS AN OTHER CROPS THAT HAD VINES, VINES WOUlD RAP ON FINGERS SO FINGERS WERE REMOVED AN WE CAllED THEM SPEED FlIGHTING BECAUSE THE PITCH CHANGED DRAMATICAlY IN THE CENTER AN VINES WOUlDN'T WRAP