Okay,

Well good luck !

And remember each sail is different, you being one of the first Landenberger sails for the alu F16 mast. So you just have to look at how you sail shapes up will sailing and adjust it with small steps each time over a couple of weeks (multiple sailing trips).

One thing i found helpful (but I still need to do alot of tuning !) is to have streams fitted to the leech at :

-1- 0.5 mtr below the top
-2- halve way on the leech
-3- halveway between -1- and -2-
-4- Halveway between foot and -2-

With these you can fine-tune the prebend and diamond wire tension.

You should be able to get all streamers to flow and flick behind the sail at about the same time. Then the whole leech is trimmed well. On my own sail I still have trouble getting the top and middle to stream at the same time.

Prebend (rake + diamond wire tension) is a starting point from where you use the downhaul and mainsheet to further tune you mainsail. It is not unreasonable to expect different prebend settings for different conditions. At first just try to find a good average. When you really start racing then find different settings for light winds, strong winds, medium winds and solo sailing. Often the first two can more or less be combined into one setting.

Good luck !

I still have to take out a week of stuff to get my rig right. And I don't know when I'll do that before the World Cup. I may just not have a chance.

Wouter