For reference on my own examples from the page before: I'm *not* using KTE, I'm indeed storing converted KePubs in my Calibre library

.
(Old habits die hard: I was used to do it for KF8 conversions for my Kindles, so that seemed a logical approach to follow for the Kobos, too ;p. Plus, that makes for free filtering: if it has a kepub, it ought to be on a Kobo

.).