ePub creation is a breeze
Ever since S&R is in place and working fine in Sigil, creating an ePub is as easy as can be if coded correctly. If your headlines are okay , you just have to replace those headlines with chapter break plus headline, check the TOC and the meta files, put in your personal CSS and the epub is done! Takes about 30 seconds to change a Gutenberg html to a great ePub. Thanks a lot, Valloric!