Fuel line routing

I had basically the same question. I'm not sure if I'm going to keep the 5/16" line as return or not, but I also have a new 3/8" line I want to install. After looking at all the preformed bends in the new line, I wondered has anybody been able to thread the new line through the hole and keep the line in one piece?

BTW, I really liked some of the solutions presented.