Proposed Solution. Two digital levels should be installed under the playfield (front and back) that report back to the display. You can set your desired incline via setting. The game will produce a unique tone or callout (so you can hear it from under the table) for side to side level of each level, as well as the set pitch.
As for the original post, new Sterns are supposed to have the leg levelers all the way in for the desired pitch on a flat floor. I forget which title it started with that they changed the rest position inside the cabinet for this to work, but it's mentioned in the setup guide. I've seen a few games that were playing horribly because they were much too steep. Anyways, I think I have a rather inexpensive solution to a long standing problem. Stern, JJP, Spooky, etc please hear me out
