I just bought a new Windsor Tourist from bikesdirect.com and I assembled it with lights, fenders, and the rear rack that it came with. My concern is that I have some extra parts. I've had no prior bicycle mechanic experience. Anyhow, there is a small elbow-shaped metal tube with a clear plastic tube inside it. Anyone know what this is used for? I also have a small S-hook and a couple of extra screws. I don't think any of it is critical, but I am not sure. The only thing I think I have left to do at this point is adjust the derailleurs. The bike came with basically no assembly instructions. Only the technical service manuals from the shimano components were provided along with a generic "bicycle assembly manual" written in China-English.