Laser Shaft-Alignment Authenticator

If you need to align one shaft very precisely with another some distance away, this device can do so very well.

It uses a small off-the-shelf, $20 laser from Amazon:

https://www.amazon.com/Quarton-Laser-Module-VLM-650-01-LPA-INDUSTRIAL/dp/B00ANY8KPK/ref=as_li_ss_tl?ie=UTF8&qid=1441589791&sr=8-3&keywords=industrial+laser&linkCode=sl1&tag=michelio-20&linkId=66dd7b9ece8684c304fdb5a576fa7eeb

And a regular CR2032 battery to power it:

https://www.amazon.com/Quarton-Laser-Module-VLM