Found this on my 12" tom yesterday. Right above the bottom lug. The line on the left-hand side is just where the ply meets. What I'm trippin about form the bottom lug half-way up the the top lug. Doesn't look like a crack, there is no visible damage to the ply in the interior or from the bearing edge. The lacquer doesn't have a crack in it either. I never noticed this before, so I'm thinking it might just be part of the finish. Any help is appreciated. Thanks.