Great info, thanks!
So this means, idle descent rate should be around 4 - 4,5 m/s at 140 - 150 km/h
Also, found this in the other manual posted here:
So, there should be a 9 m/s descent possible at 190 km/h
I’ll try to adjust the drag to meet these points. Cruise speeds will be slower due to this, so at one point the engine should be tuned as well.
I hope we will get an official fix with these data.