New Inter forestay

[Robbie.g]

Assuming that the tang for this new inner is in the correct position for the cut of your existing sail, and that the runner tangs are all in. Then i'd pick make the new stay the same dia as the lowers, and unless you plan to make the runners fixed, then avoid wire like the plague (chafe, and pain in the arse factors), go for spectra or any other 'exotic' thats within budget.

theres me 2 cents worth enjoy...

[Brion Toss]

Hello,
As far as the size of your new forestay goes, it might well be the same diameter as your lowers... assuming those are the right size. Wire size is not relative to displacement, but to whatever portion of the total load the wire will bear. Have you run the standard calc's for this?
Fair leads,
Brion Toss