Hey guys. My Mark III recently started to hum very loudly, especially the lead channel. I know I have my settings turned pretty high, with Volume 1 at 9 and Treble at 9, but this is the tone I've always used and it didn't make so much noise before. It makes so much noise that if I turn the master past 4, it will start feedbacking on itself when my guitar's volume is all the way down. I've just ordered a high gain retube kit from Eurotubes. Will new tubes fix this problem?