Posted a video of the Micro VR issue with two cabs. Check out my sig.
What such strange behavior!!! Are you sure the upper cabinet is not damaged?
The only problem I had is when I plug both cabinets, the limiter doesn't work well making a noise like exploding at the beginning of a very low note (like B) at high volume (say 2:30).
Did you have this problem?
Recently the tolex covering the head is peeling out.....