what type of shoe/cleat system is njs approved? do they all have to wear the same thing, or can some guys use a slotted type cleat system or some hybrid of the mks pedals and clipless style that i've seen posted before? i'm just curious since you never see njs shoes offered anywhere (not that i want them, i just want to know. ok maybe i would want them if they didn't cost over a hundred bucks).