Well, I installed my shelf to mount my projector right side up. The fan noise is incredilbly less audible. Funny thing though, before, when I had it ceiling mounted, I never noticed the auto-Iris even once. Now that it's right side up it is very distinct and I may just turn it off. It may be something I get used to and may be able to tune out, but we'll see, as of right now it's pretty annoying. ARGH.
Epson 5030ub, Marantz 7009, Emotiva XPA-5, Oppo 103, SVS Prime Towers, Center, Satellites x 8, SVS PB-2000 x 2, VApex 100" standard electric, PS3, wife, 2 kids, dog