Try options 1, 2, 3 and see which you like the best!

Yup and that is what I HATE about sail manufacturers.... whined about it on the Gaastra forums and got sledged for it but I still think they need to realise that a 426 luff on a 430 is silly. Design the damn thing on a 400 for Christ's sake!!!! My Simmer 5.0 with a luff of 428 rigs on a 400 IE they used their brains and realised the pulley / cleat assembly is WELL below the bottom of the mast at minimum extension.

Anyway bitch session over.

Option 2 is for a heavier than average guy. On a stiffer section of mast, lets say about 10cm lower down the mast than what it was designed for, will require more downhaul but suit a heavy guy. It will be a bit more powerful but will not respond to gusts as well as the leech wil not open up quite as much.

Option 3 suits a lighter guy as it has the opposite effect.

At a very rough guess, if the sail is being used in the middle of it's comfy wind range, option 2 if you are 85kg plus. Option 3 if you are less than 80kg. If you're 82.5, well nobody can help you

So am I! So I guess option 2 is the one for me aswell!

Thanks for the help!

And Mark - completely agree with you, it can't be that difficult to add 4cms to the length of the luff (but then I'd need an extension that didn't add on 8cms!)