Tonight, there is some clear sky here so I try a bit. Yes, it seems that all commands to my mount works well - Gemini 2 and G11. No problems there, that I can see.
I tried tonight with a 3.5.3, but because of several Kstars-crashes, I switched back to 3.5.1 (anthter R-Pi)
With this, guding works OK-ish tonight - that is, it is guiding. But as you can see in the log, it goes off in some very wild RA bounces, seemingly some resonance (?). So I turned off, switched back to PHD2, and again, nothing of the sort there.
My settings with internal: I use the GPG RA Guider, have guide rate 0.5, and started out with 133 in proportional. (does that matter when I run GPG?) To try to reduce the swings, I first increased, then decreased the proportional gain, but could not get rid of them. So shut it down.
What might I do wrong here? What settings should I tweak? (the previous non-guiding situation still being a mystery - did not even upgrade the Kstars-Ekos).