The machine did almost exactly what the FAQ instructions state. The only difference is it measures the fluid exactly ounce for ounce. It takes out
8.2 quarts of used fluid and it is replaced with 8.2 quarts new fluid.
All it was is a large can with a rubber bladder in it. You fill the bladder with the fresh oil and as it is emptied into the transmission the area under it fills with the used fluid. The machine only regulates the amount going in as fast as it is coming out. If I had a few Volvos with automatics I would build my own unit. Heck all I would need is the hose fittings and hoses to connect to the Radiator. Then make a can system that was gravity fed with a can underneath to collect the old fluid. Put a inline valve on the top hose to stop the flow if need be. I figure two clear 3 gallon plastic lexan containers Marked off in 1/2 quart increaments on a 3 ft high rack would be all you would need. Put a clear glass or plastic tube in the end section of the return hose just before the collection container on the bottom to monitor the color of the fluid coming out. I figure less than $100 max to build it.