The only further suggestion I got...Get a "single cat HDMI extender".Cat is more stable (use Cat 6).Your next projector might have HDBaseT.And cat is easier to run(It this projector has LAN for updates, run two)
Screws don't cause damage?
It depends if you can mount to the ceiling...or need a pole. I've never checked the 1080ST for lens shift.
Edit:
Just checked...the 1080ST has no lens shift. The projector has to be mounted where it is, essentially, at the same height as the top of the image. So, if...
ViewSonic Pro8200
InFocus 8606
BenQ W7000/7500
Vivitek 5080
Those are your choices...leaving out the Vivitek 1080(3x color wheel...and the least featured) and everything approaching $5000.