I've just commited my trusty commuter that have served me well in the past to a life(for now) as a fixie. It's awaiting surgery at the lbs, great guy mike that's gonna replace the wheel and chain and strip all unneccessary hardware off. It's my baby, but i just got a skinny new mistress that weights half of my baby so i figure i'll switch to riding a fixie for my commutes, it'll be good training.

my question is what should i change on it if at all? I'm gonna slowly change out components if needed to streamline it further without killing the possibility of switching back to stock. How much does a new track crank cost? any advise is always welcome.