The new ones are made with gabun plywood instead of 100% poplar and have tounge and groove joints, I think I might have one if I really do have a Namm cab, I don't know if they had any of the new cabs at Namm though, I need to get that confirmed, the plywood it's made out of is definitely not 100% poplar, the wood it's layered with looks like the description of gabun as well.
later,
-Nick