^ this ^
To reduce the prebend you need to either tighten the lowers or loosen the uppers. The bend is caused by the forward vecter of the swept spreaders. Loosening the headstay will take tension off the rig (which is good) but it minimally change the differential between the uppers and lowers.
It's not really a skiff but is definitely an "apparent wind sailer" so you might benefit from looking into Frank Bethwaite's book "High Performance Sailing" and study some of the differences in how to handle this type of boat. There are some basic differences in how these boats sail, and how...
I hesitate to jump into this thread, but I've done some sailing on gusty lakes with big wind transients.
There is a huge difference between 25 kts of wind, and under 10 with gusts of 25 that last 5 to 10 seconds and often come from 30 degrees off the persistent wind direction (if any). The...
If you're considering making your own sails, or going the route of a kit (maybe you're a sailmaker already, I'm not and I have been exposed to it enough to know it is VERY finicky work); give a call to Dirk at National Sail Supply in Florida. He's a designer and broker but is very knowledgeable...
I was very interested in these boats, and followed them for a while. I remember a boat on the West Coast that had twin rudders, but IIRC that boat also had a wheel.
It sounds like your boat's structural modifications may have been made with more eye to weight reduction than structural...