I have come to loathe Friday nights Saturday mornings. I always seem to grab a bad Dollie at my turn. The set I bring in sometimes stays together and even if not I leave the Dollie for my meet driver. No big deal as I usually have sort delay anyways. I pretrip dollies good. The problem I've had in my 3 months in feeders so far are dollies that have a valve stuck open. This morning I get set hooked, turn on air to rear, crank legs up and come back by Dollie to hear air escaping from underneath the frame. Pisses me off, there is no way to check for that. But my question is am I doing something wrong. The leak today was under the driver side of Dollie right in the middle. I just don't know. Feel like its me cause out of all the dollies to choose I seem to pick the 1 out of a 100 that's bad. It's been at least 3 times I've had this on a Saturday morning. thanks.