I didn't make it to the end of your video
When I have assembled my uBITX V3 I laid out the controls on Fusion360? to get everything where I wanted before I cut the holes in the screen. Then 3d printed a template? to verify and to outline the holes
On some other devices I wanted to cover up holes so I printed a panel with the controls where I wanted and laminated the used front steel panel with the 3 d printed panel. Drilling holes and notching the used steel cabinet where needed.
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73
Dave