i had problems with the wood blocks splitting before wearing out, you dont have to replace the augers just put some on , the cast round flange with the 3 bolt holes need the be cut off b/c it will hit the tabs for the clean out (on 21 series or later ) just drive the spindle part in the end of the auger(comes with a short piece of pipe to keep from damaging threads) ,just be sure to take a file to clean the inside very good , after installing be sure to check rear bearing and gear. then install bearing flange assy. the bearing is replaceable it has a snap ring that holds in the flange. the 3 bolts for the flange are way to long even though they have threads all the way down just get some shorter makes it look better. mine were easy to do b/c my feeder house was off, pm me for any questions