Check out the gallery - a lot of folks have posted "work in progress" photos over there!
Also, with the plate sizes you have (1/4" thick) , be sure to reinforce the one that will be used to actually mount the lasers and optics - a "frame" mounted to the bottom of the plate, cut from square aluminum tubing available at Lowe's, Home Depot, etc., will go a long way towards insuring a nice, stiff platform for the expensive parts of your projector!
Good luck - and post pictures!!
RR
Metrologic HeNe 3.3mw Modulated laser, 2 Radio Shack motors, and a broken mirror.
1979.
Sweet.....