Hello Whigrose,
What a fabulous machine! We don't get redeyes here, and yours is an absolute beauty. Also, I'm so pleased you have found my Youtube videos and that they have been helpful.
Sorting out the tension can be tricky. Some machines I have sorted out in seconds (yes, really!) but my most beautiful machine, which is the only one I consider too beautiful even to use, took me four very long evenings staying up far too late. You can never tell.
You will have hours of fun with your machine. I look forward to seeing pictures of the first quilt you make on it!