Wait!
Hello,
Don't send the crane away until you have a good four-way staying setup; you have to release each wire, after measuring, to put the terminal on. And it's really, really important that the mast be utterly centered and raked before you measure. And you'll need extra tension on the jibstay and backstay, to get all the slack out. Oh, and of course you'll need to deduct for elasticities, and terminal and turnbuckle lengths.
Fair leads,
Brion Toss
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