I flushed out my left wing fuel tank to prepare it for sealing with the fuel tank sealant (MC-240-B1/2 purchased from Van Aircraft) to seal the fuel sender. Decided to wait until i can take it to the garage to do this so i don't get formaldihyde fumes throughout the house. I proceeded to cut the hole in left nose rib #3 for the insert to push the sender cable thru (from the top of the tank), and then cut the hole for the return line (for if I decide to install it. I may just cap it at the tank, still not sold on either direction to install the return or not, but making the hole will allow for the descision to be made later at any time (even after the plane is done).