I've owned the Zoom 506 bass pad for over 2 years now. It had served it's time, and now I have read that Zoom made a new version of it with a built in expression pedal. Does anyone own this yet? How long has it been out on the market? Is my idea to upgrade a good one, or should I stick with my old faithful? Oh, and anyone who attemps to dis or bash either Zoom pedals or myself for using them will be totally disreguarded. I am not looking for irrelevent opinions, as is the case in many threads.