Got a problem. You can tell from my first message that the Karlson cabs my friend and I built contained ducts. As I recall Comet Cleanser containers w/cardboard sides were a perfect fit. But rummaging through all the Karlson references I can find today, even very old ones, nary a one has any internal ducts. What we built were clearly Karlsons with the big exponential V front and canted speaker mounting board. But, if recollection serves, the interior was divided into two chambers ducted together with the cleanser cans. Can anyone explain what is wrong here?