If you plan,to use a pinch,or augmented pinch,with any significant weight,,you will also need to look into a change of style as well,,most likely..In my research,i think the style was more focused on the push of the bow,,than the drawing of the string....i also feel,,the Mediterranean style was used more than people think...Also,,it is often said,that the thumb draw,,can only be used,,with the arrow resting against the bow,,on the same side,,as the draw hand...I can assure you,,that this is not exactly true,,with a slight modification in the technique..