Hello Anton,
Good point, I'll edit my post to replace "red stars" with "stars to which red paint has been applied", and further add a distinction between the fully red ones and those which only have red in their center.
ETA:
Here is an interesting You are not allowed to view links.
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Login to view. by Elmar Vogt, with his own page-by-page count of the stars in Q20.
Strangely, he counts one more star than Anton and I do on EACH page.
No disrespect to Elmar Vogt intended here, but I am certain he has miscounted: in his post, he develops some very interesting thoughts about the pattern of painted/unpainted stars, and shows the correct number of them, visually, using his "-xO" system. However, his totals for each page are incorrect.