The C270 adapter works with the base, screw and nut from this mount design (thing: 6308788). Print in the orientation shown in the print bed photo.
Update 1-17-24: Revision 1 is slightly shorter in depth so the claw on the C270 can close more and doesn't fall off of the adapter. You're welcome :) (it drove me nuts!!) also added the FreeCAD source design.
logitech_webcam_adapter_sv07.stl | 27.3KB | |
logitech_webcam_adapter_SV07_Rev1-Body.stl | 77.0KB | |
logitech_webcam_adapter_SV07_Rev1.FCStd | 54.8KB |