Correct. If you do see movement in the stock tank, it is because of the water pump, not the IC pump. And not sure about a "how to" on the "spit tank". Study the pic.'s carefully. The little tank can be gotten used on E-Bay perhaps; that's how I acquired mine. It is a BMW power steering reservoir. I got the idea from another member "Tunaglove" a few years back. If you decide to do this, and have any questions, you can P.M. me. And 180 is right about your need for the always on mod.