Yeah I tried the whole push the mirror to the ceiling idea and the upside down approach, but really the improvement is minimal. The 2nd mirror mounting bracket is the only thing I have found that is actually worth the time of doing. Seriously it improves visibility a ton. Also if you are above 6'4" like me and others on here the 2nd mounting bracket puts the mirror well above your line of sight, which used to be a problem for me even with the seat tilted back and rear view pushed all the way up. Your call though, and yeah the "aquarium sealant" might work, but the urethane windshield glue is awesome, but you have to let it dry a couple of days before twisting the rear view back on there. Just my 2 little pennies worth.
In Christ,
Ryan