Totally agree but until and if that lowest number becomes better or absolutely defined the only way I know to find it is to go lower until SQ worsens appreciably then back up a degree or two. Going south with temp research is certainly a more benign/innocuous pursuit than going north ;-)
Statements in my posts are opinion only, not to be construed as fact. Any projects I engage in are at my own risk! Their outcome cannot be assured and may result in success, small/no change or catastrophic failure. I encourage no one rely on anything I say or do as gospel and to realize your mileage may vary!