Laser pointers for monopod alignment

I've been messing around with laser pointers/monopod panos lately. If you stick a laser pointer on the ground pointing up the beam can be used for a guide of course for the lens. Put the camera on a monopod and move the assemby for each shot so the beam is hitting the bottom of the lens at the No Parallax Point.

This is a version of the tilted (or overhanging) monopod concept for getting minimal obstruction for the nadir.

To make this more ergonomic I made a couple of modifications. I mounted the laser on a Monster Pod with a bubble level so the laser would stick to the ground and be pointable exactly up. Then I attached to the monopod a piece of translucent plastic about 20 cm under the lens and protruding forward so its front edge is just back a cm from the from of the lens. So you can look down on this and see where the laser spot is hitting.

Now with a shaved Nikkor 10.5mm you can easily see this spot at the bottom of the frame through the lens as the lens can see somewhat backwards of itself and you can magnify this area in LiveView. So you can position the camera very quickly and accurately through the lens.
So there is this synergy between >180 fisheyes, laser pointers and LiveView DSRs.

Peter M