Glad to see a happy ending on this thread.
I've been following along with interest. I've been messing with a couple of 964S YFs I rebuilt a while back and have been struggling to get either one of them to run right on my 216. I'm not telling you this to hijack Otto's thread- when I run out of ideas I'll post my own thread to solicit advice. Page 11 gave me some more info and things to look into and check on top of other info in this thread and others.
Just wanted to say I appreciate the knowledge base and discussion here that helps us quiet ones who just read and follow along most of the time.