Loads
Hi again,
Contrary to what intuition might tell you, backstay loads are lowest, by far, when on a run. Apparent wind is what loads the rig, so the real force comes on a beat. And even then, the backstay takes less load than the jibstay on almost every sailboat.
As for the wire size, 5/16" is the largest that you need for the uppers, and 9/32" might do. Lowers smaller still. What are the pin sizes?
Fair leads,
Brion Toss
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