Personally I don't believe in sailing with much weather helm on the I-17. The daggerboards are the same as those of the I-18 and therefor are bigger than needed for the loads of the single hander. I would de-rake the mast. Move up one whole aft and tension the rig with the turnbuckle in the forestay. Best trick is to place one aft stay one hole up and the other 2 holes up. Now tigthen the forestay (not to much) rig your mainsheet system to a trapwire move traveller out and pull hard on mainsheet. The aft stay that was moved up two hole will be easy to put in the right hole. Rig is now nice and firm.
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<br>Why not much rake on I-17. Baords are already big (bigger than Nacra unis etc) and neatral helm is nice. You might want a lttle weather helm (not as much as you have now) so that the rudder are not just extra wetted surface drag but contribute a little to pointing too, this is more efficient. So I would say something between what you have now and perfect neutral helm.
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<br>Wouter<br><br>