My wife and I have thought on this machine quite a bit as we work on it. We believe it sat in a storage locker, or someones basement/garage for many years. Before that perhaps it was dropped and the ZZ lever bent, or someone didn't work on it right.
At any rate it was dry dry dry inside. And it took nearly 6 hours of sewing and working with it for the Tri-Flow to get into the needed places. I'm going to see if my wife has something to make with it before we put it in rotation with the others.
Joe