Why this studio exists
A useful rock-tumbling resource should help after the purchase as well as before it. The batch journal gives your observations a place to live. The field guide helps you interpret the choices and problems behind those observations.
What John contributes
John Morris is the named author and editor of the guides on this site. The editorial work brings together manufacturer documentation, specialist instruction, and practical decision frameworks. We do not present research as personal testing or claim professional geology credentials.
A transparent relationship with readers
This is an affiliate-supported site. If you use an attributed Amazon link and make a qualifying purchase, we may earn a commission. That relationship does not turn a researched description into a verified performance test. We explain the basis of our guidance and link the sources readers can inspect.
Help us make it more useful
If an instruction is unclear, a source changes, or a model detail needs correction, contact John with the page address and the relevant documentation. Specific corrections help more than a general score or star rating.