Headless Horseman Rear Support Frame

Create a 3D-printable mechanical support frame for a children's Halloween "headless horseman" costume. IMPORTANT: This is ONLY the rigid rear support structure. Do NOT include: - shoulder straps - waist straps - buckles - clothing - cape - human body - head - pumpkin The final object must be a clean, lightweight, printable 3D assembly. DIMENSIONS: BACK PLATE: - Width: 11.00 inches - Height: 8.00 inches - Thickness: 0.20 inches - Rounded corners - Centered and symmetrical TWO VERTICAL SUPPORTS: - Quantity: 2 - Height: 11.22 inches - Width: 1.18 inches - Thickness: 0.20 inches - Parallel to each other - Distance between the centers: 5.91 inches - The supports must connect firmly to the back plate. TOP RING: - Outside diameter: 7.09 inches - Inside diameter: 4.92 inches - Thickness: 0.80 inches - The ring connects to the two vertical supports. - The ring must remain completely open in the center. CONNECTIONS: - Add strong mechanical mounting points at the top and bottom of both vertical supports. - Use countersunk or recessed screw holes. - Design the connections so they can be assembled with screws and nuts. - Avoid sharp edges. - Add fillets/radius to structural corners. - Keep the structure lightweight but rigid. PRINTING REQUIREMENTS: - Designed for FDM 3D printing. - PLA or PETG compatible. - No supports where reasonably possible. - Split oversized parts into smaller pieces if necessary. - Add alignment pins or dovetail joints where a part must be split. - Each part must be exportable as an individual STL. - Make all parts symmetrical and dimensionally accurate. FINAL OUTPUT: Show the complete assembled rigid rear frame in 3D, with: 1. Back plate 2. Two vertical supports 3. Top ring 4. All mechanical connectors Do not include the wearable straps. The straps will be added separately later.

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.