Nato: The Kogan Kard™
It’s essential that violinists know if their violin is sick. And that’s where The Kogan Kard™ comes in.
With this tool that fits in your violin case or wallet, you can quickly assess if your violin is in spec or not. In a few seconds, you will be able to know if your violin needs to see a luthier.
For USD10, you get the pdf files ready for printing, a manual, and video tutorial. If you would like to save yourself the time and labor, for USD20+, you will get the same, but we will mail you your Kogan Kard™ so you don't have to do any work. (Details are in the included pdf manual.)
Watch the short promotional at https://www.youtube.com/watch?v=ucivl0IyD40