The present invention provides a method, apparatus, and system for efficient, high throughput, consistent cleaning of soil from the root system of a plant. The class change apparatus also includes a storage unit configured to store apparatus information including class information of the client device. An intermediate network is connected to the first edge network via a first router and is connected to the second edge network via a second router. The flange attaches to the subject’s head, firmly holding the ear coupler in place over the ear. At least 10% of the tin is in a reduced oxidation state. A main shaft is rotated to cause a swing motion of the caulking tool.