Well, to be honest the difference is outstanding when setting the speakers ~12cm higher.
I didn't even want to run another GLM calibration as I was enjoying the new sound so much.
However, I did a new report for curiosity:
View attachment 260445
All I can say is wow! As a reminder the first colomn was amber (right) and red (left). Now it's near perfect. But as you can see I still have a bit of early reflexions so... I tried with foam on the desk to reduce the comb filtering even more.
Here are the results:
View attachment 260449
I think I can stop tweaking, the results are awesome.
I still have that amber in the bass region, Actually I don't really feel the 60hz dip. When I'm bored I'll try to move the sub and see if I can improve in that area.