Mini blind headrail end cap, 1 x 1 in aluminium headrail - printable replacement (STL + STEP + parametric FreeCAD)

Printable replacement for a small part that often breaks or goes missing. Dimensions: 25.4 x 25.4 x 1.6 plate, 10 mm deep U-plug for a 0.5 mm wall, 4 crush ribs mm. Verified: The 1 x 1 in outer size matches the listing. Estimated: The rail wall thickness (0.5 mm) and the U-channel shape are assumed. Please check: Measure the inside of your headrail and change `alu_t`/`fit` to match. Includes STL, STEP and the parametric FreeCAD .FCStd (Params sheet), so you can adjust any dimension before print…

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