There are only 6 frisbees that count in that goal...
Also, you can check out some of my photos here:
http://www.flickr.com/photos/kimsrob...7632447784120/
6 frisbees shouldn't have trouble fitting in, though robots that climb will have to be careful not to touch those frisbees or they won't count if I remember the rule right(though look it up, I only did a quick scan).