You can print light portable yagi components. The boom is 25 mm PVC or Al pipe. Elements are 3.2 mm Al welding rods. Reflector for 2m antenna is divided to 2 parts. Is longer than 1m and is connected with screw terminal. Radiator is 4mm brass welding rod. You can build any antenna from http://www.qsl.net/dk7zb/PVC-Yagis/PVC-details.htmPrint from ABS or PLA. Radiator holder with support and other parts without support. You can modify openscad files for your dimensions.