Otter board dual keel rope lengths

[Custom Deluxe]

I know it's been asked 100 times but I can't search topics currently, does anyone know the rope lengths for otters when you install half keels? I think it's 8 1/2 and 14 1/2 but if anyone knows I'd appreciate it

Thanks

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[BAZOOKAJOE]

Mine are 9.5/12.5

[Custom Deluxe]

Thank you!

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[Get-A-Way]

When you shorten up the aft rope it pulls harder. Also lower both ends, front and back, 1" at the board. It is spelled out very clearly on Big Jon's web site.