I have a hard-forked repository of someone's future eFiction 3.5.9 and merged those changes to my Testing Grounds, which previously ran 3.5.8.f1.

This turned out fine (barring the buggy touchpad issues), so I do have a layout of the 3.5.9 additions/changes and my MD5 -> bcrypt password + MyISAM -> InnoDB engine + latin1 -> utf8mb4 collation modifications. (Though, looking back, it seems I may have to force all tables to utf8mb4 in the install script anyway...)

However, my mods are for the 3.5.8.f1 version, so this will have to be documented for the future 3.5.9 changes.