RE: A hard plunge rattling behind Stay Puft and falling in PKE or ECTO Goggle orbit instead of a smooth orbit.
I grinded down the gate corner as much as possible - didn't fix it. Raised the gate as much as possible - didn't fix it. Made sure Mr. Puft's ass was out of the way and still would rattle shots in the the PKE lanes instead of around the orbit. (yes, I have the softer spring on the plunger).
UNTIL, I added a well fitted piece of plastic on the left side of the shooter lane wall. Basically about 8 inches long and just a few inches high to cover the metal on the left before the drop off. This helps force the ball to the right and on to the curve behind Stay Puft. Played 10 games and made every plunged orbit smooth as Gozers butt. If it stays consistent I'll post the dimensions and pictures.
It felt good to have the 100% consistent plunge to left flipper. Not sure if it because of this but I made a new personal high score: 5.6B.