alright. I got the beastX somehow sorted out. It's not perfect, but probably my flying will adapt to it, too.
The motor has crazy power.
It needs the LiPos at room temperature, otherwise performance is lost. Hentta earlier today was nice, but I did another flight under floodlight in the evening, and non-frozen packs make a huge difference.
It's a bit sad, but possibly this is now my most capable heli. For stick-bangin' 3D, nothing can replace power.
The catch is, it's very small and very fast and very twitchy.
We can't blame the heli for the latter - the more punch it has at full collective, the smaller the corrections in "normal" flying. And the same on aileron / elevator - the maximum roll rates are very fast, and it follows that the sticks get more sensitive.