Is 5 Hoppers the limit? Can I do 5 Hoppers, a Joey, and 2- 211k's for one system? Can I do 6 Hoppers and 2- 211k's? I currently have 5-922's, 622, 211, 3900. Dsih sent my a letter that I need to replace my 3900 by May 31, 2015. Thinking of upgrading my whole setup. I know they only let you mix...