Coming back to your requested Targa Iam working for automotive industry, customers like Porsche and BMW, so high quality is something in my DNA. A Targa is not only cutting away the roof, for me it would mean a new design targa related, something like this, but vintage inspired from old 911
That also means sorting out problems like water, noise at high speed, storage in the car, doing prototype plus improvements.
For lets say 5-10 cars it would make no comercial sense, would be for passion only, but lets see how everything develops next year.....