Unless he's using scrap wood he's salvaged, Mathias almost always uses birch plywood. He uses the gears in many heavier-than-you-would-think-duty applications.

Unless he's using scrap wood he's salvaged, Mathias almost always uses birch plywood. He uses the gears in many heavier-than-you-would-think-duty applications. Mathias was an engineer for BlackBerry Ltd. before he retired young.