So my new hoses and all that arrived and I was dinking around on ebay yet again and I saw a seperate main unit and wheels for a Rainbow and I put a bid on it. This new unit I am going to put my 4 quart on it and it will be used for the rug scrubber. I have found it a pain in the butt when you are cleaning having to switch back and forth with the different tools you are using. So I have two machines for a full system. Anyone else do this?