>
> You need
>
> \setupsectionblock[bodypart][page=yes]
> \setupsectionblock[backpart][page=yes,before={\page[left]}]


I tried that Wolfgang.

However I'd like the pages setup like in my last example with, in a double
sided document, the back page on the [(next even page) + 2]. So, refering to
the output of the last example: page 10 being a blank page without page
number and, as is, the back page on page 10 + 2 = page 12.

Alan