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I went through around 5 versions before getting it right. I ended up using an 80 mm diameter carbon fibre tube with a 2-3 mm wall. The end fittings are in 316 stainless, and are just riveted on.
The forces working on the forebeam are enormous, so I reinforced the beam on the aft side with an "horisontal dolphin striker" Stays are 10 mm 19 strand wire, after playing around with different folding systems, these are now fixed length.
My prodder is about 1 metre.
I can post pics if that helps.
Regards
Alan
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