Sorry for the delay in reply.
I moved it when I cleaned it. The mirror inside that housing, at least mine, was very foggy. When I polished it I found out it rests on a hinge like frame. Hard to describe but it moves like on an arc kind of assembly. When I polished the high side, it moved. Gently pushed it back but it was just a gross guess as to placement.
I can align it with my HVPOS, etc., adjustments but I've had to really move that sucker. Used to live at -1 and picture was perfectly aligned. Now I'm at -32.
Has to be some way to align it, some adjustment.
I'll not be buying another light engine. Any money I spend now is going towards a new flat panel. Time to move on to new technology.
The air flow through these Mits sooner or later brings enough dust and dirt that they have to be cleaned, lamp issues, etc.
Price for very nice 60 inch flat panels very doable these days.
E.B. White said, "I arise in the morning torn between a desire to improve the world and a desire to enjoy the world. This makes it hard to plan the day."