About to invest in room treatments; GIK, RealTraps, DIY -- what is your experience?

I have 3 art panels rear walls look good too as well as curved bass absorber diffusers in rear corners. 
Diffuser and bass tritraps on first reflection points and some in front corners too. 
Large leather g plan sofa. Thick carpets... And other furniture cushions used to further clean image. Should have something on ceiling 3.7m up... But cornicing too pretty to mess us. 

Helps with sound imaging all of it... https://imgur.com/gallery/B6BV1rW
Hifi room https://imgur.com/gallery/bRKSwoW

Also placed speakers using cardas method really helps

@hilde45, stubborn nulls or deep partial nulls just need more bass traps and in the right place which are the corners. All corners can be considered, This means the wall to ceiling corner and the wall/wall corners. And unfortunately they must be BIG.

Superchunk corner bass traps that go from floor to ceiling are very effective and easy to DIY cheaply. Mine have turned out well and look great. A 2’ x 4’ OC703 or similar panel is cut in half giving 2 x 2’ square sections that are then cut on the diagonal providing you with 4 triangular pieces that are then stacked one above the other until they reach from floor to ceiling. This is what it takes to absorb bass frequencies which as we all know are long wavelengths. Google for easy DIY plans. In previous posts I have provided links to programs that will analyse the modal region of your room. They all show bass build up in corners.

See link for start of Bass Trap
https://i.imgur.com/Lwx8NTR.jpg

@corelli, nice clean layout you have. Am I mistaken and you referred to bass traps on your rear wall. If so I am afraid that they will not be true bass traps and wonder what professional said they were. They will provide broad-band absorption but for bass will need to be in some corner and a whole lot deeper. Ignore this If I misunderstood you.

I have noticed some suspect advice from Foley at Acoustic Fields.

Thank you Lemonhaze. I have seen some instructional videos on how to make corner traps. They look easy-ish. (I’m not that handy but this seems doable.)

I posted a single scan to Avnirvana and got some interesting feedback from Earl. https://www.avnirvana.com/threads/how-much-can-the-results-of-two-identical-scans-vary.8061/post-608...

Appreciate the input.

Having watched a bunch of Dennis Foley videos -- which seem sensible -- can anyone tell me what you found problematic with what he says or does? 

nolojunko, excellent posts!    ditto lemonhaze.

When dealing with bass peaks or nulls, the corners are the obvious places, but you also look at the frequency of those nulls/peaks and consider your room dimension and where those nodes are for each null/peak.

Are you just using two main full range speakers @hilde45, or do you have subs?  When you look at the cost and complexity and esthetics of bass control, sub-arrays make a lot of sense. I personally would still want acoustic control in addition, but it does make for a far more controllable problem.

w.r.t. Foley, https://www.digistar.cl/Forum/viewtopic.php?p=1681#p1681   Then the post after that one, and maybe a web search.