Do I understand this correctly--to get the most soundproofing as far as stopping noise from upstairs to downstairs and vice versa, it would be best to not only do the basic layering by putting panels up... But to have a second layer suspended in between the joists? Like if the joist are 8" deep, you could run trim at about the halfway point and use it to support panels in a sort of suspended fashion? And then put up your ceiling panel foam. Does that make sense?