I had a quick question about the focalcalc program. When it says distance from LCD, where should that be measured from? The surface of the triplet lens? The center of the triplet like in the picture? Thanks.

The calculations are based on the "optic center" of the triplet. We assume this to be the geometric center, which is close enough. With a few inches of adjustment on the triplet you can attain the proper focus for your setup.

Thanks.