i know there are a bunch of topics about midi amp switchers but none of them talk specifically about the express series. i thought maybe since there are only 2 channels it might work. so i am wondering if the beringer or roland midi foot pedals with amp swichers will be able to switch channels without extra gear. also i have looked a the tc electronics G major. will this switch channels on an express 5:50 without the need for extra expense? thanks for any input!