labile implemented. The folded thin sheet aluminum is unfortunately only formed as U. The rear end is not connected to the side panels. When loaded by the coffee machine, the lateral portions are moved outwardly visible. A small web plate in the front and rear portions or continuously as a square tube would otherwise well-made cassette stabilize sufficiently. I'm assuming that the cartridge more loses after prolonged exposure to mold and therefore send you back. What a pity for the good idea and optics (for 3 stars). I would like to spent a few cents more, despite the already high price of a little more stability.