I have a modified Yost Sea Tour 15 that has a strange problem. My feet seem to be a little elevated in this boat, to the point that I burn out my hip flexors after a while trying to sit upright. I'm trying to find a solution and figured I'd see if others have confronted this problem before. A few salient facts.

1. The kayak was built in one of Bill Hamm's classes, and has a rounded masik and flat back deck. Tom worked on modifications to make it more or less more "Greenlandy."
2. I'm a reasonably flexible/athletic guy, and have paddled much tighter-fitting boats without this issue.
3. My inseam (30") is short for my height.
4. The cockpit is sufficiently large that I can sit further back, but that cuts the freeboard pretty low and the boat looks "tilted." Also, it doesn't seem to resolve the issue.

Since I obviously can't lower the feet, I was thinking about getting some 1/4" plywood to elevate the seat in 1/4" intervals and see what it takes to get a better fit, if possible. I'm aware of the decreased stability trade-off, but this is a very stable boat already.

Is there something else I should be trying? Anybody have this problem before and resolve it?