2 Modelling what I have
A mount is only as good as the model of the thing it mounts. Neither maker publishes a drawing or CAD for these parts. A web search for the monitor's SKU found no other listing at all; the chassis is a generic OEM design sold under several brands.
So each part gets a reference model built from evidence, in this order of trust:
- Calliper measurements on the real part.
- Measurements from my own photos with a rule in frame.
- Standards (VESA 75 means M4 on a 75 mm square).
- Listing photos and maker's figures.
- Guesses, marked as guesses.
Each model has a Params spreadsheet whose Meaning column marks every value as measured, photo, standard or guess. As callipers replace guesses, one cell changes and the model follows.
Both models share one rule for coordinates: the origin sits on the feature a mount bolts to. For the monitor that is the centre of the VESA pattern on its back face; for the PC, the centre of its underside. A mount drawn in that frame drops onto the model without a move.
- 2.1 The monitor: measuring a screen from one listing photo.
- 2.2 The mini PC: finding two M3 inserts, and a photo of the wrong model.