[snazzypig]

Looks like you used NiCopp (nickel copper alloy tubing) to make your fuel line.
I have used it to make brake and fuel lines and it works well. Sometimes I fill the
tube with sand or glass beads to make sharp bends. Also smart that you didn't use any rubber hose as fuel line to the carb. I have heard of more than one engine fire caused by a hose or clamp letting go.