The Hadley telescope is an open-source project aimed at designing and building telescopes using accessible, cost-effective methods, such as 3D printing. While the original Hadley telescope design may not have been for a 10-inch diameter directly, it is possible to scale up the design to create a larger mirror and housing if you have the appropriate resources and equipment.

To 3D print a 10-inch version, you would need to consider several factors:
Design Modifications: You may need to alter the existing 3D models to accommodate a larger primary mirror, as well as ensuring the structural integrity of the parts is maintained when scaled up.
Printing Capacity: Ensure your 3D printer can handle larger objects, or plan to print in sections that can be assembled.
Materials: Consider using high-quality materials that can support the weight and stresses of a larger telescope, such as reinforced filament or a combination of printed parts with metal supports.
Optics: Acquire or fabricate a 10-inch mirror, and ensure the other optical components (secondary mirror, eyepiece, etc.) are appropriately scaled and aligned.
Assembly and Alignment: Larger telescopes may require more precise alignment tools and techniques to ensure optical performance.

Building a larger-sized model is an ambitious, yet feasible project for someone with 3D printing, mechanical skills, and knowledge in optics.