Abstract: A door-hinge jig for forming hinge-receiving recesses in a door edge or door frame includes an elongate body (having at least one longitudinal rail element connected by at least two rail members), at least one hinge-recess guide element (defining a guide channel and including engagement means), and at least one connector element for connecting two rail members. The engagement means engage with the at least one longitudinal rail element to set a longitudinal position of the guide element. Each hinge-recess guide element is located in a recess guide region extending continuously along a length of a longitudinal rail element. A hinge-recess guide element is selectively positionable to define a position of a guide channel in the recess guide region without obstruction or interference by a remotely located connector element.

Abstract: Extraction devices and related methods are disclosed. Extraction devices disclosed may include a hopper, a piston, and an evaporation chamber. The hopper may be filled with a plant material and a solvent. The piston may be removably housed within the hopper so as to form a hermetic seal with the hopper. Once a solvent and extract mixture is formed within the hopper, a valve in the bottom of the hopper may be opened to allow the solvent and extract mixture to flow into the evaporation chamber via gravity. The remaining plant material may be compressed by the piston to remove any remaining solvent and extract mixture. The solvent may be evaporated in the evaporation chamber leaving a purified plant extract. Various types of plant materials may be used within the hopper. Various types of solvents may be used as well, including heptane and hexane.