This could be stock for composite airplanes as it is
rather easy to move hard points on a sandwich firewall.

The cost would drop as the cost for computer laser cutting tubes
is cheaper when doing 5 sets or 10 sets at a time.

The tubes could be shipped as a kit for local welding.

That would dramatically reduce the cost of shipping as the tubes
can be in a rather small symmetrical cylindrical package as opposed to a large
box.

How say you?

Paul Lamar