So, I'm considering taking my bike to the bike doctor just to have a routine checkup. Is this worth it? I'm attempting to learn to maintain the thing myself, and just learned how to replace brake pads and chain. A lot of it, however, I know nothing about, and for all of it I'm a novice feeling my way in the dark. I've got the Zinn road bike book and I've pored over Sheldon Brown's website and a few others. Would it be worth my while just to get someone who knows what he/she's doing to look it over? (I should mention the bike is relatively new - just bought last August - and only has about 1400 miles on it.) What do you think?