Even so the (main system) room is huge, the floorplan for the listening area ("room") is not that large (20x20, one side, one back wall). The speakers are located at a 'half' or '3/4' wall, and can only be 2 feet away from that wall).
https://drive.google.com/file/d/1yRozuEvtpBvvnY4mXcfs0tSG6KmfDYo5/view?usp=sharing
Open baffle speakers: sounds intriguing. Curious: will open baffle speaker with 'normal' subwoofer kill the benefits? Need to look for an opportunity to listen to an open baffle. Might be the effect I remember when I first heard a large transmission line woofer (very natural, deep, airy; I was blown away).