Re.: your point 5. You should be careful with positive gains. It will lead to digital clipping. Look for peaks (room modes) in the frequency plot (under 200Hz) and reduce these with Sweet Room. If you find you have to raise an area (i.e. use + gain) the <"dB_GAIN_> for both channels should have the same, but negative value.
*
Devialetless!
Roon or LMS/brutefirDRC on DietPi_x86_64
piCorePlayer/ISORegen/HeadStreamer/Yamaha HP-1
250 Pro CI, MicroRendu, Mutec MC-3+USB
Devialetless!
Roon or LMS/brutefirDRC on DietPi_x86_64
piCorePlayer/ISORegen/HeadStreamer/Yamaha HP-1
250 Pro CI, MicroRendu, Mutec MC-3+USB

