I could not believe the prices on these. I started building my own yesterday and went on line last night for some ideas. And found some places are asking over a 100.00 and more for a simple project. I'm building mine out of 1x6 pine used some 1/4 ply with just drilling holes in it randomly. I intend to build mine 32" L x 24" W that should take a lot of sanding dust into the vacuum.