RE: poll for fuel line types
I use black (1:1) fuel hose for the pressure line just because I like black, heh. But I still keep a clear fuel line on there because it makes starting soooo much easier. Plus its easy to pop on and off when servicing the buggy, which would be a pain with hardlines.
I honestly can't think of any practical reason to use hardlines. Braided lines maybe if you are running through alot of brush or sticks that could cut / tear the soft lines, but you still have the problem of not being able to see inside the lines.