What are your thoughts on this for performing live: Having a powered 12'' or 15'' monitor and small mixer for my amp and vocal mic. (my own personal mix on stage) I cant carry the larger amps due to my back and getting older. I sometimes play large places where I need an 85 watt twin but dont want to carry that much weight. I was thinking I could use an old blackface deluxe amp and run that and my vocal mic and the output of the consoles monitor mix into my monitor system. It works for Eric Johnson. What do you guys think?