It's all 3/8" line, from the tank to the engine.
I really don't see the benefit of the added bulkhead fitting. In all my work on RV-10's, the fuel line from the tunnel side to the tank was never a problem. At first, the plans called for a single line from the tank to the fuel selector, and that was at the top of the tunnel, not lower like it is now. That was very difficult. They finally added the bulkhead fitting at the tunnel side, but that made the line to the wing easy. It can even be installed after the wing is installed. I personally wouldn't add the extra 2 possible points of failure on each side. If I was doing so, however, I would add the bend just as you did.