The README.ZOS has the comment
Extra space savings arise if you download the combined release
from the I would expect 3 downloads for python 2.7 & 3.6 & both
I do not see a combined release
There are only 2 versions available for download now. You can download both versions (2.7 & 3.6) to have the combined release.
That results in 2 separate releases. There are no shared modules