I have been working off and on an Enders 9070 stove that has been sitting for perhaps decades and was all seized up. With only one (other) example in the Gallery and the owner / submitter not responding, it is basicly uncharted territory taking the mechanism slowly apart. Slowly as in soaking, gently trying to get things moving, then soaking again. The stove is not ready yet, but the mechanism of spindle, pricker and generator is taken apart, clean and contains some fascinating details I want to share here. The pattern is a familiar Enders design of tank, fuel line perpendicular to the tank with a control unit cum burner at the end. The difference is in the detail, with a stubby, solid generator body that supports the burner bell above and is screwed into the control body underneath it. From inside, a solid brass rod with a pricker needle attached and shaped as a rack can be freed if the massive jet is unscrewed. The needle 'rod' is guided by a steel tube set central in the steel mesh of the vapouriser. Taking the control body apart, a complex assembly appears that contains a remarkable detail: a snail cam. This cam engages the rack on the needle carrier, so by turning the control knob of the burner, this rod is moved up or down, hence the title. Flame regulation and shut-off is up to the lower profile of the needle carrier, which is pushed upwards to free an opening within the generator, and is pulled down to close this off. All these parts are beautifully made, that fit without play using fine threads one does not expect on a stove. Rather, it is like an instrument maker's product that must have cost a lot to produce, as it seems overcomplicated as well. Therein lies the possible explanation why this model stove is so rare, as the retail price must have been (too) high. Not rebuild to fire her up yet, it is questionable however how shutting off will work, as it alos depends on how tight the snail engages on the rack. In comparisson, a spindle with a pointed end to close off an orifice as found in most regulated burners is of supreme simplicity and efficiency. Enders did provide excellent alternatives that were simpler to make, and evidently did sell in quantity. like the 100 series that also offered a choice between roarer and silent mode for the burner, yet posess that same solid german engineering Enders is rightfully known for.