I googled, googled and searched on this forum but I can't find any construction plans for building RPTV box with measurements for mirror angles, distances and sizes. Any calculators?
I'd like to make a projection 2m x 1.5m with Evo 1.2 projector, the smallest freestanding BOX as possible. I have a very tight budget and I really must have all on paper before I invest a cent in building it.

Thanks

I can't help with calculations, But I would think all you really need to do is figure out the distance it takes for your EVO to project to your optimum size then put a piece of cardboard in the light path that is the same size as your mirror.

When the image fits inside the cardboard, that's where you can put your mirror to fold the image.