From an engineering standpoint, I'd like to be able to set the scale of my drawing vs. its real world counterpart.

Back in the old days when I made 2D CAD drawings, I would set the "sheet scale" to 1:48 or 1:64 or whatever I needed. I could enter the dimensions for a box measuring 6' by 8' and the software would create a box the *scale equivalent* of a 6'x8' box. It was a very handy feature. I'd love to be able to toggle between 1:1 and some arbitrary scale as needed.

Just a thought.

Chris