Good deal. That mity vac is a handy little tool to keep around the shop. I use mine all the time. Makes a test like this easy to do and you can also test power valves to see when they open up (they open really slow for those who haven't tested them). With the right attachment you can bleed your brakes or the clutch or other such stuff and you can test various vacuum operated things in the car. In the 70's almost everything was vacuum operated but these days it is all digital stepper motors so the Mity Vac isn't quite so useful on modern cars.