Way back in the day, I fabricated fuel lines that go from the valve to each tank. People complain about how much of a struggle this is and they're not wrong. The only way I could do it and get them halfway decent looking was to unscrew the bracket from the front of the spar that the kick panel screws to, slip it on the fuel line, then screw it back on.

Well, I made beautiful fuel lines, patted myself on the back, then set them aside for later so they wouldn't get damaged. When I got ready to pull wire bundles, I completely failed to consider the assembly order that needed to happen, and discovered that once I got wiring pulled through all those brackets, I was completely unable to get enough slack to move the brackets enough to re-install the fuel lines. Sigh.

After looking at his for way to long, I bit the bullet and went the same route as many before me; building these in two pieces with a union splitting them, so that you can feed the two halves in individually and accomplish the final flare with them in place.

I feel really stupid that I did that, but it's done, they're in, and everything looks like fits without conflict. FYI- the picture below makes it look like the fuel lines and wire bundles are rubbing, but they aren't. there's probably 3/8"-1/2" separation. However, I'm a belt and suspenders kind of guy and I'll incorporate some standoffs in this arrangement during final assembly of the fuel system. I would do it now, but I'm confident that at least the outboard segments will need to be loosened and slid out of the way when the wings are trial fit. I will cut the outboard end to final length and flare it in place at that time.