New 20 ounce tumblers available now! Forum donation credit with purchase. https://www.wildguzzi.com/Products/products.htm#Tumbler
You need a Service manual?
If you have GuzziDiag(or software) and cables you hit a reset button & self adapting parameters button after sync of TB's.It is right at the beginning of the service man.
GuzziDiag how to PDF:https://www.dropbox.com/s/4kiqh3bu68op7od/GuzziDiag.pdf?dl=0
I can't access the document on the Yahoo group