Marble Exercising Machine - Part 8 - Piston Engine

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This part of the Marble Exercising Machine is the Piston Engine. It features a stylized version of a side-valve straight six engine without a cylinder head, and the valves are purely decorative. To create this component, you will need one each of the specified STL files with the following exceptions: * Pistons: Six units * Exhaust Cam: Six units (note that exhaust and inlet cams have different designs) * Inlet Cam: Six units * Cam Follower: Six red units for exhaust and six blue units for inlet * Valve Head: Six red units for exhaust and six blue units for inlet * Thin Spacer 2: Three units Keep in mind that the 59-tooth belt must be printed using a flexible material, such as TPU-95A. Common components from part one also include: * Spur Gear 8 Hex: Three units * Spur Gear 16 Hex: Two units * Bevel Gear 12 Type 1: Two units * Belt Wheel 12: One unit * M6x10 Cap Screw: Two units * M6x20 Cap Screw: Nine units * M8x7 Large Head Thumbscrew: Three units In addition to these components, you will also need stainless steel rods with the following specifications: * Three millimeter diameter rods of lengths 139mm, 79mm, 26mm, and 19mm * Six thirteen millimeter length rods * Twelve two millimeter diameter stainless steel rods of twenty-five millimeter length for valve stems.