Master Sketch Reference Geometry (1in circle x 8in shaft)

Create a **very simple 3D master sketch CAD file** that I can download and import into Onshape. Use my reference screenshot as the design guide. I want a basic master sketch used as transparent reference geometry for future CAD modeling, NOT a detailed robot or a rendered image. **Design requirements:** 1. Create a 3D coordinate origin with three perpendicular reference planes: Front, Top, and Right. 2. Add a circle centered precisely at the origin on the Front plane. 3. Add a long, straight cylindrical shaft extending horizontally from the circle along one axis. 4. Include centerlines and construction geometry to align the circle and shaft. 5. Make the reference geometry easy to see through, with thin lines and a clean, minimal CAD appearance. 6. Keep the reference planes visible and clearly intersecting at the origin, similar to the provided Onshape screenshot. 7. Use simple placeholder dimensions: circle diameter 1 inch and shaft length 8 inches. 8. Organize the geometry logically so I can use it as a master sketch to design other parts around it. **File requirements:** - Generate an actual downloadable CAD file, not an image, screenshot, or written instructions. - Preferred format: a native editable Onshape document or a CAD format that imports into Onshape while preserving as much useful geometry as possible. - If a native Onshape document cannot be generated, provide a valid FreeCAD Python macro or FreeCAD script that creates the reference planes, circle, centerline, and shaft automatically. - Also provide a STEP file for the 3D shaft and an editable DXF file for the 2D reference sketch if possible. - Verify that the generated files exist and can be opened before providing download links. Keep the design extremely simple. Do not add wheels, motors, batteries, robot frames, decorative features, or unnecessary components. **Final deliverable:** Give me the actual downloadable file and concise instructions for importing it into Onshape on a Mac.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.