@James-F Here is the firmware with Low, Medium and High settings. https://drive.google.com/file/d/1s2nsIJRXnO_PCNTRWniIhAeW0SC9ZXa8/view?usp=sharing
@Retrorunner Your photos look like your TV loses color with scanlines on. Is everything black and white when you set scanlines to 100%? If so maybe it will help to change scanline position from Top to bottom.