I have a Nirve Classic and intend to put and run a Sick shift which negates my coaster brake (supposedly) any ideas how to still use it, set up a disk brake. I think i will need something because all would have are a set of old cantelever up front. ha another question: I am trying to use my crossbar as a fuel tank. i tried to fill it the other day to find out that it is attached internally to my rear forks and down tube any ideas how to block them ?. or what substance might be petroleum proof to try to inject threw small holes to block the passage.