Glad you were able to figure it out! Corners have always worked best for me. But I’ve always had largish, irregular rooms, not square or shoebox rooms.
Regards,
Wayne A. Pflughaupt
Bass frequencies “chase” room boundaries, and the closer you move towards a wall, the stronger (SPL) the signal is, with the dead-center of the room being a kind of “bass hole” where the bass level is the weakest. Perceived bass levels would be strongest near a corner where two boundaries meet...