Here are the case design files for the Sinc. The .ai files have multiple layers to toggle on/off to generate the correct set of plates/mid-layers/etc.
It's suggested to use the enclosed design.
In the plates folder, there are DXF files of the switch plates and bottom plates. These are the same design as the FR4 plates that are sold. The switch plates are designed for 1.5-1.6mm thickness.
In the enclosed-case folder, there are STL files for a design where the FR4 switch and bottom plates are used but have their sides covered. The top shell has been designed to be threaded into directly from underneath using long M2 screws.
For the Rev. 2-4, you will need M2 screws that are 16mm in length. For Rev. 1, due to the thicker mid layer, you will need 20mm screws.
For aligning the SKUF feet so that they are straight, you can print off this tool to help you apply the SKUF feet better: SKUF Alignment Guide
The original case design can be found in the older-design folder. The design there can be used to make a stacked acrylic case
These case files are released under the MIT License.