I am now a little confused as to what they are calling "three ply" The host was saying the drums had three plies but showed one of the plies as having three plies itself. So are they 9 ply or 8.? Anyone know what they are calling a ply. The Ludwig dude said that the materials are "bonded" together, when the host said glued, and yet they showed the plies being put into a machine that was applying glue. Enquiring minds want to Know.