I built my first HeNe spiro projector when I was like 12... found the instructions in a book called "The Laser Cookbook"...
The Laser Cookbook, this one
I am very sad that I cannot see the beautiful pictures in this thread anymore...
Please post them again in anyway you can!!!
I am hoping to use these pictures as a basis to start when I start building my first scanner in the future...if you don't mind?