Press carefully BEFORE assembly! Seriously. Manufacturer error, a hole in the top of the bag - see video. How can you rely on those seatbacks to support the weight of towing when they can't even hold the air out of the box? I was so careful and actually removed my springs so I didn't damage the bags during installation. Everyone else stuffs and stuffs the bag into the spring without properly removing the panhard bar/damper/swing and then the springs. Here's where I get Mister right and one of her bags doesn't even hold 10psi for more than 2 seconds. I'm not sure I even want to get another pair. Maybe I'll try flint.