A new boat - REC126

I have decided to build a second boat (strip-built). I like the mill creek double, but it is very big and difficult to manhandle on my own. The new kayak will be designed with the following factors in mind:

• short enough, and light enough for me to lift onto a car roof, and in and out of the water. I am aiming for a length of 12 foot 6 inches (375cm), and a weight of 15 - 18kg.
• Room for my feet (size 12), and me 6 foot 2 inches and 95kg, and a bit of 'lunch' (say 10kg)
• nice and stable, but not too sluggish. Tracking well without a skeg or rudder.
• not too expensive to build

I have done the design in some freely available software (Kayak Foundry), and have arrived at the following:

A few other design points:

• No deck hatches. I intend to store 'lunch' behind the seat.
• Two removable bulkheads - one at the front which will also provide a support for footrests, and one well behind the seat to create a watertight chamber for buoyancy.
• Deck lines with flush fittings 3D printed.
• cockpit lined with carbon fiber cloth (between bulkheads and below sheer line)

Here are the form positions for construction (and showing the two bulkheads):