Hello,
Take a look at my book on the Ta 152 in the 4+ series. I have a lot to say about wings and flaps. Interesting to see that Hitchcock's book is referred to as the Bible on the Ta 152, there is some of that book that needs to be looked at a little closely, particularly the suppositions about the colour schemes. All the evidence that I have after years of research with my German historian colleagues points to 76/81/82, there is no evidence that I have ever come across that they were painted in any other way (and that includes interviews with Focke-Wulf Cottbus factory employees).
Thanks,
Malcolm.