In the spirit of sharing & collaboration: I'd like to offer up my recent work to develop a 3D printed 70 cm Lindy. This leverages the excellent article by AA2TX, striving to make the design significantly more manufacturable. In the share folder (link below) you'll find both design files and descriptive project notes.
Constructive feedback to enhance the designs or clarify documentation is certainly welcome. While this effort produced a nicely-performing antenna, I'm sure there are still opportunities for improvement.
Curt / K7ZOO Tucson AZ