In my case 40mm it's enough.
Also added couple of fillets at sides.
Source SolidWorks file and .step attached.
| Stand_Mac_Mini_2011_1_Single_Dock.3MF | 152.0KB | |
| Stand_Mac_Mini_2011_1_Single_Dock.SLDPRT | 14.2MB | |
| Stand_Mac_Mini_2011_1_Single_Dock.STEP | 16.3MB | |
| Stand_Mac_Mini_2011_1_Single_Dock.STL | 653.9KB |
