Well that is proof positive. Five degrees should be visually obvious but is not apparent in photos I have seen. Ideally one would like to see a rear view showing the wing trailing edge line. Bager 1968’s take off picture does show some up sweep towards the tips.
Thanks Graham for posting the Report extract. I was not refusing to believe what I had been advised. I was not being persuaded by the submissions. I am not “skyshooter” either.