How is the back left plastic leveled? I'm speaking of the one with three lanes for the ball to go through. On my machine, the ball will go about 80% right, 15% middle, and 5% left. It seems like it should be secured on the left side, but the Back Alley mod posts above indicate that it isn't.
Also, the sound is sometimes scratchy/muffled. I was told I need to replace a capacitor for that?