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Here is the video on how I routed and installed the fuel lines in the cockpit.
Zenith 750 Cruzer Aircraft Specialty AdI ordered four braided steel fuel lines Aircraft Specialty on Friday, and received them and installed them on Monday! That's fast!

You will have to make your own measurements, but each of mine was slightly over 8 feet long. Of course they come fully assembled with the fittings of your choice installed. I chose all straight fittings.

There's only two cockpit connections-one at the fuel selector, and one at the wing. These lines are really nice and super high quality. I would highly recommend you get in touch with Steve at AircraftSpecialty.com

Zenith 750 Cruzer I'm test fitting this one...
Zenith 750 Cruzer I goes from the fuel selector, through the center of the fuselage, and under the baggage floor.
Zenith 750 Cruzer Then it goes up inside the piece that get riveted to the aft door upright. Then out the top to the elbow fittings and to the wing.
Zenith 750 Cruzer To get things secured under the center arm rest area and out of the way of the torque tube, I clamped the two brake lines to the floor.
Zenith 750 Cruzer I countersunk a screw from the bottom up. I used a countersunk screw just because it looks nicer.
Zenith 750 Cruzer Inside the fuselage, I had to open three of the four holes up to pass the lines through.
Zenith 750 Cruzer All of the lines are routed through.
Zenith 750 Cruzer Now I have to figure out a way to secure all three together as close to the wall as I can. They can not interfere with control stick movement.
Zenith 750 Cruzer Here's how I secured the lines. I took and adel clamp and screwed the end together.
Zenith 750 Cruzer Then I put it in a vice
Zenith 750 Cruzer and smashed the hell out of it!
Zenith 750 Cruzer Now instead of being round, it's an oval and will hold the fuel lines up against the bulkhead. The good thing about this is that once it's smashed, you can take the bolt out and the holes stay lined up! This makes it easy to install. 
Zenith 750 Cruzer Here are the clamps holding the lines very nicely. If you watch the video you will see that I later routed the fourth line with these three.
Zenith 750 Cruzer View from the front.
Zenith 750 Cruzer Three lines shown here. The final install has all four lines clamped here.
Zenith 750 Cruzer Fuel lines are secured in the aft fuselage area under the baggage floor.
Zenith 750 Cruzer Looks nice, huh?