Hey, first time for me here. I plan on getting GPO and Logic Studio and using them together. I have a full sized 88 key keyboard that I've been using with Garageband and Finale but it doesn't have the pitch bend and modulation dials(or whatever you call them) and I need those dials for certain instruments in GPO for live recordings. I really don't want to have to buy a whole new piano keyboard so I was wondering if there is an external controller that has those dials that I can plug into my Mac and use along with my keyboard? Thanks