@snaarch1 Thought I’d go from another approach. What is your room size? Untreated? Lot’s of hard surfaces? High/low ceiling?
If so, I would look into that as well as a possible source of the high frequency issues. Perhaps a DSP solution?
Understandable the constraint on room treatments but you’d be surprised at what’s out there that my actually work aesthetically.
Also, what’s the budget? Any constraints on placement that would affect your mains and/or sub(s?)
btw. happy to hear you enjoyed the results of your speaker positioning.