Reply To: concave diagrams › Forums › Article Discussion › concave diagrams › Reply To: concave diagrams April 13, 2018 at 5:43 pm #4463 Mary RaffertyParticipant @vistagrande These are the only ones I know that have been published. http://www.ultratec-facet.com/PDFs/Hargrave-concaveSynopsis.pdf http://www.upperdesignstudio.com/ashton/fantasy-cut-designs.html