Well some of that seems excessive. The tray is stable and I even put sorbathane under it for vibration control. Don't see where a tripod is necessary. If I owned one, I'd use it. Did learn some things though. I kept lowering sub until it gave me a setting closer to mid than -12 every time. Also did test w/projector off and made sure to do at least 3 positions. You gotta remember, I have an entry level receiver, used speakers, and a good but not amazing sub. It's the best I can do right now. Having said that, it set crossover to 150 front and center which seems way off. Gonna run it yet again..