Doubting Sound Treatment ?

You might try tweaking speaker placement first. I've tried a lot of formulas...the best one for me was placing the speakers against the narrow wall in the room firing down the longer length of the room and placing them one fifth in from the side walls.  Measured to the center of the front baffle or to the tweeter or half way between the tweeter and the mid-range/bass driver.  So if the room is 160"w, for example, you would have the center of the front baffle 32" in from each side wall.  It's a starting point...then tweak from there. 1/5 front to back too...but that was not possible for me...but I got excellent results regardless.

Speaker placement first, then acoustic treatment. Best sound I got was having nothing between the speakers (except a thick Persian rug)...so placing the equipment rack along the side wall.  Most people can't do this...but this really helps imaging. 

Also avoid any picture frames with glass. Art with canvas or wood carvings are helpful but anything hard/shiny/smooth is problematic. 

Charlie you are out of your depth unless you have lost wax cast a trigger guard, swamped and rifled a blank, logged your own walnut tree and then bandmilled her down, dried it five years, stickered in natural air, etc....make your own sights because Redfields while good are not Hammerli quality, ya know low standards

but ya know in an olive branch of peace , you are welcome to come shoot an elk with my diy Hawken some day

But yes there are people who work differently some buy, etc

my apology if my post came across as denigrating

i am sure there is something I can learn from you

For the DIY set, work diffraction just as hard! As most dedicated audiophile rooms I encounter lack natural and engineered diffraction. You can build replica RPG diffuser fairly easily. 

Rack along a side wall vs centered between speakers or worse in a corner is in the valuable Jim Smith book

@sandthemall +++++

Rack along a side wall vs centered between speakers

Correct, worst thing you can do for imaging and depth perception, is have your equipment between the speakers. Speakers at least a min of .5 to 1mt in from the side wall, and as far out from the from the back wall as you can, if? you don’t need the extra bass loading the back wall can give.

Cheers George