Hi Richard ,Peter
I had thought of solid cores , here you could see the nuts , as the nut would be
on the outside of the tube, you could check them or wire lock them, But the
1/4 moons as in your diagram allow any water to escape from within the tube.
Further more you could increase and have the say two 1/3rd moons, with two
drilled
recesses in the back and say two 1/2diameter springs slipped in-between the
two part moons .
To fit just squeeze the two 1/3rd shaped moons together and pop into the end of
the tube , now its holds itself in place . Now you can attach a piece of wood
slide it down the tube twist it about and line the holes up then pop the bolts
in and tighten up.
As for the 2 little springs leave them there, or take another thin piece of wood
push down the tube and push them out, as they have done there job, and use them
again for the next set of 1/3rd shaped moons you are going to slid down the
tube to do the next pin hole.
Alan
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