Rowan, do you have the new Jasta 23 book yet? I just got mine, and posted first impressions in "What's interesting to read". As I said there, you may have trouble choosing the schemes, with 63 in the book! There are 9 Roland D.VIa's - only 2 I've seen before, Kissenberth's and the black banded one included by WNW.
They also included 7 new profiles from Jasta 30, some of which you may have covered on Volume 2.
Pete