Making the cutting iron. I bought a piece of O1 flat-stock 3.5mm (1/8”) X 38mm (1 1/2”) X  460mm (18”). these sizes correspond to imperial conversion. 4mm x 40mm x 460mm may be a near alternative in metric availability. This is a common high carbon steel used for tool making and you can use it … Continue reading Making a Curve-soled Plane – The Cutting Iron