With a new colony, I wouldn't get in a big rush to add room yet. Especially if your adding it with foundation. Drawn comb is a valuable commodity. Get the brood box mostly drawn out, then add the next box. They have to control the temps in the hive, so too much room can be detrimental for a small colony. Sometimes things happen fast, (I'm adding a 3rd box to a couple packages started 6 weeks ago), but several colonys started at the same time have just begun to work the second box. You will probably find it beneficial to standardize your equipment as well. Sometimes you need to move things around, and with all different sizes of equipment, it doesn't work out too well.