Anyone using an extension cabinet with their Tone King? I have an Avatar G112W open back that I'd like to use as an extension cabinet for a Tone King Metropolitan. I have a few speakers to try in it but was wondering if anyone else was using an extension cabinet and if they are what kind of speaker. The cabinet has a Weber Chicago in it right now and I'm not liking it much compared to the combo cabinet. I have a Hellatone 30, Hellatone 60, Eminence Texas Heat, Eminence Red Fang and JBL E120 I can try in it. I talked to Mark Bartel today and he said his speakers are made by Eminence but they didn't have a stock model that was very close to his specs and he didn't expect that one of his speakers would sound the samein another cabinet.