I believe we are using either 2" or 1 1/2" bore cylinders, most likely the 2" bore, that have a 6" stroke. We used three storage tanks right before the cylinders, they all tie together after the valves. I don't have any good pictures, but I do have a
youtube video.
If you want to see us on a field, you can watch our matches from
St. Louis on the blue alliance site.