I suppose labelling ourselves B+ because we have lost the use of an overhead bed is a bit odd. Essentially, we (particularly the larger longer units) are Class C units, but without the bed.
Perhaps we should be C- units.... but that almost sounds like barely a passing grade. Maybe the larger units without the bed could be called Super C- ???
In my mind B+ just implies that the overhead bed is not there. It's really like Class A units, as we know they can come from mini units less than 20 feet up to 45 footers.