I was always under the assumption that what made an Acrolite and and Acrolite was the aluminum shell. I work at a music store and I had a customer come in that was dead set on the idea that Ludwig changed the Acrolite later on to a steel shell to save money. I did see that the two that we had in stock were different in finish--but, so are the new Galaxy finished Acrolites and those are in deed aluminum.
Is there any truth to this?
I also did "The Magnet Test" on the shell and it didn't stick like a steel shell should.