Got another tuning chance today. It was hot spring day at 26 deg C, too hot to concentrate…
Config #4 with no dihedral, move battery to the belly, found bottom heavy. Loaded a dummy 1500mAh battery and tried to balance. As this wing has non symmetrical airfoil, looks like neutral CG alone will not balance. I see pitch I term is busy. Video of one flight, tuning movement in QHover, one transition and QLoiter. Feels better.
Log is here.
Stripped servo gear. It fell at landing a few times. Better to use metal gear servo.
Just listened to @iampete 's Tailsitter Update session of dev conf. Great summary and insight. Lots to learn.