one thing i found on my dingo was that if the atomizer was tightened to much, it pushed the floating button down a bit and caused the shaft of the button and the pins to grind. do you still get the crunchy throw if you press it with no atomizer attached?
i tuned it a bit by a 1/2 turn tighter on the positive pin and my throw returned to "stock" silky.
Yes, it still is rubbing on something with or without a carto tank on it. It even feels like it's catching on something and is clicky. My old one has a what you call a "stock" silky press.