Sorry to ask this question again, as I remember having read about it a long while ago, but this thread is now 74 pages.
I'm having the DTR issue where even after 7 or 8 ring shots, the balls either bounce out or just cycle through without registering. It's inconsistent, as last night my wife grabbed the DTR championship by completing it in 49 seconds. I've tested the magnet, and I've taken the glass off and it seems to work fine.... however, more often than not when playing, I've got to hit the ring shot 7 or 8 times to complete the mode, and the ball seams to just fly past the magnet. No issues when starting normal ring modes (magnet grabs the ball fine).
Any explanation? Link to relevant post would be appreciated.