Just FYI, measuring by volume can be a pain. I know you said you can't measure weight now, but I'd recommend measuring by weight whenever possible, and it can be done on the cheap. I got a small digital scale at Target for ~$10 or so and it does the job nicely.
Primary: Empty :(
Secondary: (I don't believe in secondaries)
Keg #1: The Pilsen Ale!
Keg #2: Sherwood Brewing Co. Irish Stout
On Deck: American Brown