Help tuning 3D airplane as tailsitter q-plane

Hi, I’m looking for help with an initial tune for a single-motor airplane. I know this functionality has been available for 3.5 years, e.g. from this video by @tridge: https://player.vimeo.com/video/204818792

I’m looking for suggestions on improving the initial (manual) tune enough so I could go to QAUTOTUNE. I have read https://ardupilot.org/plane/docs/guide-tailsitter.html and the rest of the documentation several times, and I’m afraid I’m still lost when it comes to tuning for hover.

Logs:

https://github.com/arikrupnik/ardupilot-config/blob/master/logs/FIXED_WING/4/2020-11-07%2010-29-26-qautotune-attempt.bin?raw=true
https://github.com/arikrupnik/ardupilot-config/blob/master/logs/FIXED_WING/4/2020-11-02%2008-58-42-qhover-attempt.bin?raw=true
https://github.com/arikrupnik/ardupilot-config/blob/master/logs/FIXED_WING/4/2020-10-24%2016-38-10-qstabilize-attempt.bin?raw=true
https://github.com/arikrupnik/ardupilot-config/blob/master/logs/FIXED_WING/4/2020-10-24%2015-34-15-qhover-attempt.bin?raw=true