A mold-tool system, comprising: a nozzle housing received and held in position by a manifold plate, and abutting an end of a manifold bushing, the manifold bushing received in a manifold assembly and defining a melt passageway, the nozzle housing having a melt passageway extending from an input end to an output end along a longitudinal axis of the nozzle housing, the melt passageway being fluidly connected with the melt passageway of the manifold bushing, and the output end being offset from the input end, a valve stem movable between an open position and a closed position, the valve stem being slide movable along the melt passageway of the nozzle housing and through the manifold bushing, and slide supported at the input end and at the output end, a nozzle tip being received in the output end of the nozzle housing and detachably connected to the nozzle housing, the nozzle tip having a tip passageway fluidly connected with the melt passageway of the nozzle housing, and extending from an entrance portal of the nozzle tip to an exit portal of the nozzle tip, the entrance portal being offset from the exit portal, characterized in that the mold-tool system further has a vespel covering a tip of the nozzle tip at the exit portal, and a flute structure proximate to the exit portal for supporting the valve stem at the output end, the flute structure defining a set of flutes facing the valve stem, with each flute being located evenly around the valve stem, wherein in the open position of the valve stem allowing melt to flow freely from the melt passageway through the flute structure to the exit portal of the nozzle tip, the flute structure forms a flow area surrounding the valve stem, when placed in the open position, that is equal to the flow area defined by a cross-sectional area of the exit portal of the nozzle tip, so that the flow area may be maintained while at the same time the valve stem is supported. a nozzle housing received and held in position by a manifold plate, and abutting an end of a manifold bushing, the manifold bushing received in a manifold assembly and defining a melt passageway, received and held in position by a manifold plate, and abutting an end of a manifold bushing, the manifold bushing received in a manifold assembly and defining a melt passageway, received in a manifold assembly and defining a melt passageway, extending from an input end to an output end along a longitudinal axis of the nozzle housing, along a longitudinal axis of the nozzle housing, being slide movable along the melt passageway of the nozzle housing and through the manifold bushing, and slide supported at the input end and at the output end, fluidly connected with the melt passageway of the nozzle housing, and extending from an entrance portal of the nozzle tip to an exit portal of the nozzle tip, the entrance portal being offset from the exit portal, the entrance portal being offset from the exit portal, characterized in that a vespel covering a tip of the nozzle tip at the exit portal, and a flute structure proximate to the exit portal for supporting the valve stem at the output end, the flute structure defining a set of flutes facing the valve stem, that is equal to the flow area defined by a cross-sectional area of the exit portal of the nozzle tip, so that the flow area may be maintained while at the same time the valve stem is supported. so that the flow area may be maintained while at the same time the valve stem is supported.