You can access the OnShape document directly:
https://cad.onshape.com/documents/469580236b2c76b9a2462f54/w/444af1ebf966b5154915286b/e/a7d3e797f69b5b15229207da
It's currently configured for a 0.3" tablet with some room to spare but it's set up with variables so you can adapt the material thickness and tablet thickness.
2 DXF files are in inches, the "both" file is in millimeters.
Both_-_Sketch_1_CD.dxf | 43.8KB | |
StandMirror_-_Sketch_1.dxf | 45.9KB | |
Stand_-_Sketch_1.dxf | 45.9KB |