Editing Step 21 —
Angle corner assembly

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Attach an angle corner, using 2x M5x8 screws at each corner. Do not tighten them fully yet!

For each corner, tighten the two M5x8 screws, in turn, while applying pressure as shown in the images.

The angle corners might pull the frame slightly out of alignment as you tighten them, we will correct this in the next step. Applying pressure, to hold them tight against the extrusions, while tightening the screws, helps to reduce this.

Tech note: this is why the Bear frame does not use angle corners in other places.

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