Any tip on managing the difference in cutout sizes? The Ethereal's cutout is probably 1/2" less in diameter than the Monoprice's. I am thinking of cutting to that size, and putting the speaker on top of the ceiling (I have an attic above). Then cover it with my fiber insulation. This should be realistic enough, no? The only difference between a real installation and this there will be the thickness of the drywall.