I have one of those too but I made a few modifications to it to make it more efficient. I ditched the tube light it came with and installed four undercabinet puck lights. I also installed a regulator and water seperator. T56 is right about the lid lens. I bought a piece of plexi from Lowes and now I have a clear view once again. The biggest change I've done is to run #10 glass bead as opposed to sand. Sand is too heavy for the pickup tube. Not enough suction but #10-#12 glass bead works great for light duty cleaning. I buy #50 bags of glass and I dump the entire bag in it because if I fill it to the manufactures suggested level, it banks up opposite to the pickup tube so by filling the bottom to the grate, it always has a supply of media. I also set it up to run my little Stinger vacuum with the help of a drain fitting and some silicone. Its also important to buy a pack of the tearoff lenses for the inside of the window. I thnink those can be got at Harbor Freight. Anyway, this is my little cabinet and I find it a very useful tool in my shop. I bought an Econoline pressure fed from work for $250 but I have nowhere to put it right now so it will remain at work for now.