Baidarkas were work boats designed to carry a load. It's been suggested in the literature, ballast, (stones) were carried and exchanged with game & gear as needed. Empty, they were unstable.

I worked from surveyed drawings of Aleut craft for my hardshell baidarka designs. Understanding the average Aleut paddler may have been 5' tall and 150 pounds, I adjusted my first baidarka design to 18' 4" x 22-1/2" for my 5'11" x 220 pound size.

Reasoning, recreational paddlers will not carry ballast, I rounded off the Vee in the central part of my baidarkas for stability when not ballasted or loaded with camping gear.

Unless you are a seasoned (not salt & pepper) paddler, you may find increasing the Vee makes your design less stable.

The Vee of the keel on a skin-on-frame kayak is created by the keel stringer. I would suggest not increasing the angle to 14˚.

All the best,
Rob