Ok, now I also re-read Roy's thoughts on that (hard to keep track of everything, when you doing million things at once... sorry for lots of back and force on the same issue).
It does go contrary to what I said. Specifically <quote>Binary packages MUST be built from the SIGNED and RELEASED source package, NOT FROM SUBVERSION TAGS.</quote> - http://markmail.org/message/3odlybipss4wnczl ... So maybe instead of arguing against this further, I should try creating a source package assembly and building it into binary assemblies. Sure it will be fun :-/