Self locking adjustable blade guide for band saw

A sawmill, comprising:

• a sawmill base, extending in a generally horizontal direction, and having at least one rail;
• a sawmill carriage, capable of longitudinal displacement across said rail;
• said sawmill carriage having at least one vertical support, extending in a generally vertical direction from said base, and supporting a saw head and capable of vertical displacement along said vertical support;
• wherein the saw head further comprises:
• a frame;
• a drive driving an elongate saw blade;
• a blade guide contacting said elongate saw blade and capable of decreasing transverse and/or vertical movement of the elongate saw blade when said blade is in motion;
• said blade guide affixed to a guide support which is slidably engaged to the frame;
• said guide support having a guide support adjuster pivotally connected thereto at a proximal end, having a distal end, and having teeth on its lower edge, said teeth capable of engaging a peg affixed to the frame;
• whereby, when the distal end is lifted, the guide support is capable of horizontal motion thereby adjusting the position of the blade guide on the saw blade, and, when the distal end is dropped, at least one of said teeth engage the peg, locking the guide support in place and preventing said horizontal motion.