thanks for the reply, I will cut down the housing a bit, thought I would check with some more experienced guys first. I didn't like the rear sprocket that came with the kit, it was just a flat pressed out plate so I had to redish the wheel and pack out the axle, this worked to my advantage because I had choosen a 700c hybrid so it gave me more clearence on the stays np. worst thing i guess is the sprocket had no lead on it so no doubt it would have jumped a tooth some time. anyway the grinder made a nice lead while the wheel was spinning. should be up and running soon