I've only ever exported from Sage and Elipsa, except copy of nebo files from one Sage (or Elipsa) to another Sage. That simply works.
I've no iPad, or an Android with a digitiser, to test the standalone Nebo app.
I use Advanced Notebook on Sage with usually plain text export and copy to PC via USB. I use Notepad++ or KATE for plaintext. Or if it's got non-text items I use docx via and convert to odt in LO Writer.
I got the Elipsa first and was so enamoured with the handwriting conversion I bought a Sage and now only use the Elipsa for some PDFs.
I don't quite follow what you are trying to achieve?
My workflow is:
- Write fragments in Kobo Advanced notebook with conversion to text
- Export text each time before leaving, so from 2nd time, overwrite.
- Copy via USB to PC (it's Linux sinc Jan 2017, but Mac & Windows is the same) and open in KATE (used to be Notepad++) because it has Tabs per document (Characters, events, places, notes from web as plain text, imported from Kobo exports etc).
- Eventually outline and write a 1st Draft in LO Writer (MS Word works too).
- Replace all multiple spaces with one
- Run regex search to remove space at start or end of a line (paragraphs) and blank paragraphs and other stupids.
- Run spell check. Use custom per series/book dictionaries.
- Extra Save As in docx as you must use odt for native editing.
- Convert to epub2 in Calibre and remove docx from Calibre
- Proof read on Sage (Elipsa or Libra etc fine too) and ONLY use text input for annotations, never the pen (that's only good for Notebooks or PDFs).
- Use Calibre to read the annotations via kobo Utilities, not Annotations plugin, and copy / paste to a new KATE (or Notepad++) doc. Use regex to make the format as I want.
- Open odt in LO Writer and save As with incremented number suffix
- Edit "notes" part at start (removed on published version) to reflect what kobo annotations etc added and date.
- With annotations in a Text Editor window and source odt (or docx in Word) in LO Writer, search and edit. Mark off note in text window with a *
- Increment & save again if deleting a paragraph or adding paragraphs or reordering chapters etc.
- Repeat from item 5 as many times as needed. Maybe get to version 10+ to 40+ before finalised.
Always increment if you do ANY significant change.
Always reproof (with incremented odt if last docx is same version number) via docx, calibre & epub if ANY edit, before publish/sharing.
Make azw3 from epub for any Kindle using beta reader.