I recently purchased the Viewsonic PJ551D projector, waiting for it to arrive at the end of the week. I already have a ceiling mount, trying to determine if it will work with this unit. Does anyone have this unit and could share the ceiling mount screw locations? I called Viewsonic but they say don't have the info readily available, would have to contact their headquarters, no clue when or if i will hear back from them. Trying to get the mount in place before I receive the projector, hence this posting. The user guide shows a visual of the screw holes, but need the distances between the screws. Thanks!