The 1" thin wall aluminum tubing is hard
to find. I picked up a shower curtain rod
that was made out of it but it was a close
out, discontinued, item so I couldn’t get any
more. 1" thick wall is usually available
anywhere they have an aluminum rack.
It slides in the exhaust manifold fine
but you have to turn down the inside to
fit the lower unit. It withstands a bump
or two much better that the thin wall.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.