Small update, sad news:
I and Brian received the proof copies. They are nicely done. But Amazon won't print the 1.5 edition again.
I requested a clarification for the bizarre "We can't print that, Sir" against four delivered, perfect proof copies.
"I checked the document and found that you selected the 8.5" x 11" format and that the book contains 640 pages. I have found that for this format, the maximum number of pages we can print is 500. The book can therefore unfortunately not be published."
And it looked beautiful ....
And so subsequently the 2nd edition can't be printed by them either as it will have a few pages more.
Back to start, now with Ingram Spark. Their requirements are a bit harder, but no problem either.
Currently I am uploading the adapted pdf (1.5 GB !). Will continue to post updates as they occur.