I am ready to purchase a 3pt. post hole digger for my 1026r and have a silly question. I will be putting in 6" posts for my fence so do I purchase a 6" auger? I know this may sound stupid but do I need to purchase a larger auger to accommodate for leveling the post after it is put in the hole? Or is a 6" auger already over sized to accept a 6" post? Or is a 6" post undersized to go with a 6" auger? Help!