11/19/2019 initial post

4/19/2020 updated step and stl files to prevent printing errors

9/25/2020 updated files to have a smaller flange

11/28/2020 added 6.5" and 8", also SB21RDC dimple dome measurements

6/12/2022 added routing templates and updated waveguides for use with these templates

12/27/2023 added 6" waveguide