What you mean is projector height offset = keystone adjustment (as well as another for side to side), right?

My question was, how adversely should I expect the pic to crap out by using the keystoning? The guy really wants to bury the pj in the soffet rather than have it dangle below.

Thanks Netarc, the manual only gives a dead on, no margin for height (And, of course keystoning should create a margin).

You'll be fine Steve.

Make sure (I know, I don't need to tell YOU this), but provide plenty of ventillation and don't block the fan exhaust :)

On the AVS forum a guy was bitching about replacing his lamp every 3 months... obviously either had a blocked fan input or exhaust scene going on!!!

My ex's projector was shutting off--- dust bunnies!!! Vacummed it out... works like a charm.