i know the manual says to not do this, but i have heard people doing this. Im aware that it will void any warrenty i have with mesa, but is it possible? If so does it sound good? what are the limitations? Will it eventually **** my amp in the end? if it is possible what setting el34 or 6L6 bias setting? so on and so forth...I know mark ivs did this and id would like to use this as well but if i cant oh well. Just trying to get a for sure answer. thanks dudes and dudettes.