LoL I think I can clarify, what I'm refering to is the movement the derailer does over the gears. IE if you were on a mountain bike and set it at base for a 21 speed, you'd be on the inside of the 3 chainrings in the front, and on the outside of the 7 cogs in the back, it's a matter of getting the arm of the derailer into position, IE pressing it in in the case of the back, or out in the case of the front, with the rear you can look down from the cage pulley, and make sure it's cog is lined up with the rear wheel cog, does this make more sense?