I really REALLY like the Line 6 POD Pro X, because it's unbelievably affordable and sounds great. But, I don't like the Line 6 controllers very much. Can I hook up a normal midi controller to it? Also, how many other midi devices can I control at the same time? On an unrelated note, I play 8 and 10 stringed guitars, and will this be able to handle that kind of low end? Does the chromatic tuner work that well? Thanks!