Doing some planning and looking around for what materials I might have.
Sanyo projector system – part 3
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Best to have a plan before you start. 
Found 12mm plywood for the housing base. Keeping ventilation in mind 64 x 19mm pine for the housing sides. Might be able to use this sturdy low table thing I got from the op shop for the base box. 
The projector housing bolts to the base box with castors and the folding screen bolts to the latter – the box. 
More timber in the rumpus room, make a note of that.