At the firewall the fuel line takes a 90 degree bend upward (already done) and gets captured by a cushion clamp which will keep the fuel line off the firewall by 1/8". In the vicinity of the lower portion of the motor mount bracket, the fuel line requires an aft offset which I made by placing two 45 degree center line bends in the tubing. This takes the tubing aft of the firewall and vertical again to align it with the center of bulkhead fuel fitting hole on the firewall shelf. (The first 90 degree bend was made at a point 1/2" longer than called for to insure the forward fuel line tubing will be slightly longer than necessary).
When you are free styling you want to take your time and do a little math. The drawings showed the approximate location of the bends so measurements were taken and marked on the tubing. Taking into consideration the 1/8" gap from the firewall and the 1/4" thickness of the tubing and location to the center of the hole for the fuel fitting … the desired centerline offset is approximately 15/16".
Imperial bender - the marks on the upper handle are used for various types of bends, the 45 marks are for making 45 degree centerline bends after a little math is performed.
Just finished bending the final 45 degree bend to head the tubing aft to the bulkdead grommet. The offset bends on the firewall portion of the fuel return line turned out perfectly and truly look great, but admittedly it took a long time because I had never made centerline bends before … so I took my time and checked and rechecked and checked again before bending.
Next the tubing is curved a bit so it can be fed through the bulkhead grommets and slowly worked aft. A piece of tape was wrapped around the flaperon mixer arm to prevent it from scratching or being scratched by the tubing as it is slid aft through the grommets and along the groves on the standoff blocks.
Beginning the feeding of the return fuel line tubing through the bulkhead grommets … the recently made 45 degree bend can be seen nicely here.
Slowly working the return fuel line aft and underneath the flaperon mixer arm.End of the line … without rolling the fuselage assembly onto its side and allowing the excess tubing to be pulled out the inspection port the tubing can’t be feed in any further.
Could not finish off the final cut and flaring of the tubing at the firewall because it could not be pushed aft far enough … will need assistance to roll the fuselage assembly so the excess fuel line can be worked out the inspection port.