I’m adding return fuel lines for electronic ignition (SDS EFI) so I decided to drill the extra holes before deburring the side skins.
I’m using hoses from Aircraft Speciality Flightlines. I purchased fuel fittings from TCW that make it easy to use the existing 1″ holes with AN bulkhead fittings for the supply lines.
I drilled the additional 7/16″ holes for the AN bulkhead elbows that will be used for the supply lines (per the installation guide from Aircraft Specialty).
![](https://airplane.allanglen.com/wp-content/uploads/2021/09/pxl_20210918_1909342642123731458250192852.jpg)
![](https://airplane.allanglen.com/wp-content/uploads/2021/09/pxl_20210918_1951109699206543033271071600.jpg)
![](https://airplane.allanglen.com/wp-content/uploads/2021/09/pxl_20210918_1958451829105626931363735044.jpg)
![](https://airplane.allanglen.com/wp-content/uploads/2021/09/pxl_20210918_195900285599858473693435075.jpg)
I then removed the skins and removed the vinyl along the rivet lines.
![](https://airplane.allanglen.com/wp-content/uploads/2021/09/pxl_20210918_2159408654419919306078096939.jpg)
![](https://airplane.allanglen.com/wp-content/uploads/2021/09/pxl_20210918_2230004286767880336058612590.jpg)
![](https://airplane.allanglen.com/wp-content/uploads/2021/09/pxl_20210918_2308081284710919000288199995.jpg)
I then started deburring the holes and edges.
![](https://airplane.allanglen.com/wp-content/uploads/2021/09/pxl_20210918_2341317012576146730518600480.jpg)
![](https://airplane.allanglen.com/wp-content/uploads/2021/09/pxl_20210919_0159243546223979194646438542.jpg)
Two skins done, two skins to go.