I just bought a used/refurbished lefty for the front of my bike. The guy said it was losing all it's air and couldn't figure out why. He sent it to cannondale on warranty and they replaced virtually every part of the internals...new damper, new boot, etc. It's like a new fork. I go to air it up, and as soon as I take the pump off, all the air leaks out. Uh oh. I grab a shrader valve tool and a couple spare valve cores and give it a turn or two...sure enough, it holds air. I can't help but wondering if cannondale rebuilt this whole fork for a $0.25 part. Either way, I win!