I waited till it was time to run fuel lines. I decided to buy TS Flightlines fuel lines. They're one piece from Anadir fuel selector to tank. I drilled the holes using a uninitialized big enough to clear the fitting. I put two grommets on the line and passed it through the hole then carefully coaxed the grommets into the side skin parts. It wasn't easy but one grommet wouldn't span both pieces. Mine is an "A" model so no fear parts there.
Estes Park, CO
wirejock at yahoo dot com
Donated 12/27/2018. Plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.