Sorry, went on a church trip to an observatory last night so I didn't have a chance to check. I'll give it a look at some point this evening and find out. I'm not sure about another box, but we'll definitely add (or upgrade) something.
Actually, after looking at the box prices in relation to our budget it looks like we are exactly $1 over budget with the current boxes. I guess I had already figured in those extra teams when I picked those. Just as a reminder, here's what they were: