Started with the return fuel line from engine to firewall connection. Measured length by running fuel line from output of the fuel regulator to the firewall return connection, marked the line with a sharpie and cut the line with a sharp scissors. Then figured out where the pressure bleed-off return tee was to be located and cut the fuel line at this location. Cut the fuel line insulation slightly shorter length, worked it onto the fuel line and applied heat shrink tubing to the ends to hold it on the fuel line but then I could not get the hose clamps to fit over the fuel line plus the heat shrink tubing (they barely fit over the fuel line when opened to the last thread on the screw) so I changed my approach and removed the fuel line insulation (saved for shorter pieces) cut another piece of insulation slightly longer than the fuel line (so that the insulation will naturally expand and keep both ends of the fuel line covered) and cut a 45 degree corner off at each end to make room for the clamp. Worked this new piece of insulation on the fuel line, attached it to the engine and to the tee with the supplied hose clamps (using Loctite on the hose clamp screws). Repeated this for all the other fuel line connections, firewall supply connection to gascolator, gascolator to large fuel filter bypass and large fuel filter input, large fuel filter output tree to filter bypass, pressure bleed-off (making sure to connect it to the tree fitting with the small orifice in it) and engine fuel input fitting. Applied Loctite and tightened the large tree bolt to 25 Nm (after verifying the torque with Pipistrel) then safety wired the large fuel tree bolt to a hole that I drilled in the large fuel filter mount
