Hello Hy,
First clear night of the new year on Friday and I had the opportunity to try out your new version of KStars FITS Viewer in full colour debayered mode. Brilliant! I imaged IC405, the Flaming Star Nebula. The auto stretch applied was great and I had no problems in reframing to catch the nebulosity. I suppose that in non-debayered mode, there is not enough luminance in the nebulosity to stand out from the rest of the image, whereas the colour contrast is much more obvious.
Thanks again! Ed