Yea.. I've noticed the stock pieces are at least 10% thicker as of late. Also, the solution is always to just keep sending them back until you get the correct density added/subtracted by the factory. This means you always have to have 3 or so good pieces as backups and stuff. The problem is waiting for all of this perfection, and it never seems like I have more than one good piece, and a few real crappy backups at most. But, everything is still a good deal.