[briffle]

A project I wanted to play with 10 years ago, and didn't have time or money, was a tool you could set in a room, and it would put laser 'dots' along the ceiling where crews should hang the parts for a drop ceiling, to minimize cuts of both hanger equipment, and the ceiling tiles.

[DoofusOfDeath]

That's closely related to what I'm going for. Ultimately I'm looking to make an A.R. system that guides various house remodeling tasks, including framing and floor-leveling.