Has anyone out there ever tried the Gallien-Krueger MB212 combo with the MBE212 extension cabinet??? Seems like a very good match up to me. 4 12" Speakers, near vertical alignment, and 500watts to power it all. Weighing in at a whopping 71lbs total!!! I play in a band with a very loud guitarist and a drummer that like his toys, so having 4 12s behind me would be a big help! Has anyone out there tried this combo???