Prism99
Here is the link for Martelli's website. When the page first loads up, there is a popup box that asks if you want to subscribe. If there is no popup box, go to the bottom of the page and there is a link to sign up for their newletter.
I will also add that I love my Martelli cutter. It took some getting used to (think retrain of brain) but it is worth it.
Good luck with your thumb problem. Arthritis in the finger joints can really alter some activities.
Murphy
https://martellinotions.com/