Agreed. Do the crawl(got the stupid watermelon crawl song in my head now lol)
Also, whether or not corners will work or not will depend on the room and it’s construction. Ryan’s had big problems with corner loading, with his narrow room and suspended floor. I have 3 corner loaded subs and am flat to about 14hz. My room is very large, and on concrete. So the only thing you can do is crawl it out.