I am thinking of putting a SRAM i-Motion 3spd disc-ready (http://www.ebikestop.com/sram_i_moti...cog-HU2531.php) hub on my next bike. but i hate grip-shifts. i know shimano makes the tapfire 8 speed shifter for nexus internal hubs. is there something i can use for the sram? im open to sneaky work arounds if they will work. i know some peopl have used three stage handlebar mounted fork lockouts for stermy archer hubs before with some success. also, in general, how much of a beating could such a hub cost.