I've gone through the original primary_source.xsl and general.xsl to transfer and/or adapt all the remaining templates that I believe we need for the static build, integrating them all into the single xhtml5 mode, and trying to avoid distinguishing between them too much. At this point documents are building happily and looking not-too-bad, but there are still invalidities (some in bornDigital docs, caused by the introduction of templates from primary source), and also I think there are changes that need to be made to the chapter-splitting Stow code to make sure that the base style info for the page width etc. is imported from the parent document into every chapter. Getting there, though. Another few days...