"Compound" parabolic solar cooker, make a template with technical drawing

Step 6 Known Issues

I. When I rotate the parabola around its focus for say a 45 degree compound parabolic dish, I am left with a 45 degree"gap" which I just fill with and arc of a circle. But an arc is probably NOT the best way to fill this space to reflect the light towards the cooking vessel. A line or perhaps a dimple pointing at the focus might be better and will allow for greater concentration of light and a smaller cooking vessel.
A circle is good enough for me for the moment. I am sure someone will find a more accurate solution in the future. This will allow for more concentration of energy and larger reflector to cooking pot ratios while maintaining the long unattended cooktimes.
2. I do not know exactly how the light reflects off the dish as the sun moves across the sky.
Some light may miss the cooking pot when the sun is not directly over the focus.
3. A large (2 square meter) stationary dish (perhaps 60 degree compound parabolic) may be suitable for same time every day cooking all year long if aimed at the equinox sun at its highest point.
but I do not know how it would behave when the sun traverses 23 degrees above the aimed direction (high summer) and 23 degrees below, (mid winter) and the tropical equivalents of these times.
This awaits software modeling or small physical reflector models and laser tests.
Thank you Brian White