
I probably changed the FC kb short to something like Ctrl+F7 on the day I first installed Sigil.
I only check the epub if someone has a problem with one, which would be 1 in maybe 5,000 epubs, there's only < 20 someones, most use android tablets and they're not pedants w.r.t. layout - only contents. I'm not sure if epubcheck or flight crew ever identified a problem - most have been me inadvertently deleting a bunch of stuff, or losing an image or three.
From what you've written I'd say there's a good chance my F7 will be preserved. But if not, then as long a I have a sigh or two left, I'm sure I can live with it
BR