James B,
I don't know about Eastwood's cabinet, but I will say this. I have built several glass bead cabinets. Without some type of vacuum fitted on the cabinet, the atmosphere soon becomes too clouded to see through...you can't see what you're blasting.
Another item I found is that when you start pumping air INTO the cabinet, you better have some way for it to EXIT, or it will blow your viewing panel into your face.
The cloud and debris that this process generates needs to be contained somewhere...besides the lungs. A big shop vac would be just the ticket in my book.
Stuart
