I do some consulting work for Skip. I designed the polarizing attachment for his tool that allows the laser spot to be "focused" into a much smaller dot. His tools are used for setting up and aligning CNC and manual machine tools. If you are a machinist you should check out his site! I use one (well, several) on both my manual and CNC mill. It can turn a five minute setup routine into a 30 second setup routine
He was tracking down some new line generating lenses and I was taking up the valuable time of many companies that I will never buy anything from...but they make such cool stuff! Yes, I'm a tech geek if that isn't already painfully obvious. You should have seen the mini-displays: 1280x960 pixels in a package less than an inch square! Not cheap.