For those interested, I've concluded my research project into American Pinball. I've gathered mortgage documents, their articles of incorporation, the license information I previously listed in this thread, and a few other documents. To ensure I comply with Pinside rules, I will just link to the podcast episode we cover it in:
If you scrolls to the "Links" section, the very first link is to the Google Drive folder with the relevant documents (some of the public documents have contact information, and I did not feel like redacting as aggressively as I would be compelled to do if I directly linked here).
If you want to hear a summary/walkthrough of the information, we put that in the episode (starts at 8:23 and runs a bit over 10 minutes). Hardly needed (though we always love listens!), but if you want some narrative structure it's the only one I've put together.
Let me know if there are any problems accessing the documents (I did a few tests but I don't share a lot through Google Drive, so I may have messed something up).