Thanks everyone, Yeah waimarama is near the auto museum. Good knowledge of the area! I can move the chain a good half inch but I might slack it off a little bit. No I dont think the hub is cracked it is made like that. The spacer is how it is due to it being a weird cassette to start with. It runs real nice anyway and its a joy to ride. It will be better when I get some non perished brake pads etc.