I was told you don't need all that stuff because it will shift TOO easy. An override shifts extremely easy the way it is. I don't think n down is actual neutral. I think it just holds betwen gears or smthn of that nature. Same effect but not neutral like on a stocker. Not sure of the actual reason behind n down. Guess I forgot that one. Somebody smart will tell us here I'm sure. Not sure you do a n down with other configurations. Like a 2-5. Maybe the n down changes need more space on the drum? Can't remember. That's why 6th is taken out. I don't think the other configurations lose any gears? Could be wrong.