I'm just a few days away from ordering up the Z3 and need someone to run over these calculations for a mount. My ceilings are 3.3m high and I want to ceiling mount the projector so it looks like I'm going to need an extension for the mount. I can accomodate a throw distance of about 3m giving me a diagonal screen size of 230cm (90") and height 100cm (39"). I understand that the Z3 has a vertical shift of 100% so from my calculations I can move the image down by ~100cm. So if the projector was mounted flush with the ceiling (parallel to the floor) I could get the bottom of the image down from 2.7m (3.3m-0.5m) down to 1.7m using the lens shift. I would like the screen to be around 130cm from the floor (a further 40cm) so the only options I think are: a) get a mount that has a drop of around 30-40cm and use ~100% vertical lens shift. b) get a ceiling mount with no drop and angle the projector and use keystone correction with no lens shift (would need to angle the PJ by 30°). c) get a ceiling mount with a drop of around 30-40cm AND angle the projector using both keystone and lens shift. What would be the best option? The second question is by using almost 100% of the vertical lens shift will there be a vast drop in quality? Thanks for all the help!