SBUV3 (Solowheel) motor: vertical (zero angle) adjustment/trimming

[Paulus]

My ancient sbuv3, very similar/same motor as solowheel,
is (increasingly) misaligned, it balances
at a slightly oblique vertical axis.
Riding is uncomfortable therefore,
even a little unstable, when
compared to another EUC
of the same make/model, which goes fine.

Is there a mechanical adjustment inside the motor?
Which side of the motor should I open?
Do you have photos showing the inside?

I suspect a loosened PCB.
Or an accelerometer IC is subject to aging.

I'm read that there are people who know this EUC motor:
https://forum.electricunicycle.org/topic/13393-how-to-remove-pedalscranks-access-motor-on-solowheel-xtreme/

Thanks for any advice,
Paul