Let me try to make this on-topic.
On Saturday BRING had a 50%-off-everything sale and, among other things, I picked up two more wakeboard control arms, including the one that's 8ft long. I partially dismantled it and lashed it to the roof rack and bike rack. long enough to take some pictures. Their both now dismantlated down to the curved tubes.
It needs to set about 4" lower. Thinking about how to grip the external drip rail and transition to a round tube, I'm currently onto taking a piece of bicycle inner-tube and stretching it into the shape I need and injecting JB Weld into it to solidify the shape with a bonus rubber coating.
I have six in total and a plan that involves tabs in slots. So what I'm saying is if it takes a while to regroup and reschedule, that's good for me.