1. We think the mast sheave box was put in the wrong place when the mast was built and is actually 7" lower than where it should be . I have never bothered to check but now getting the plans out, the mast builder did put it lower. That explains a lot doesn't it!
2. I have the top of the sail tied on the wrong place on the top boom. If I move it further up the boom that will raise the sail slightly. This in turn will help tension the leech better.
3. I think we can alter the downhaul as well so that it goes up through the deck, thus pulling the sail closer to the mast
4. Reefing....the slab reefing is slightly wrong. The reef downhaul that goes through the first reefing point back on the leech drops vertically to a block on the sprit boom. The block needs to be moved further aft to create an angle so that when it is pulled, the aft corner is tensioned aft.
I guess we will have to see what happens
It's worth a try!