How do I install the calibration washers?

There are two burr systems for the Handground coffee grinder. The new burr system was released in November 2017. If you have a grinder with the new burr system, please follow the first video below that shows the process for installing the calibration washers. If you have one of the original grinders please follow the second video.

New Nov 2017 burr system video:

Original burr system video: