Changes to Step #18

Edit by Dave Ogles —

Edit approved by Grégoire Saunier

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[title] Y axis squaring
-[* 9] Take your time with this step. It is the last squaring operation for the Y axis :).
-[* 7] Move down the assembly with and position the 3D printed foot on the left and back.
-[* 2] Carefully insert the 290mm extrusion in between as shown in the 1st image.
- [* 9] Be gentle or you might mark permanently the extrusions.
-[* 5] Apply pressure as shown in the image and tighten the M5 screw strongly.
+[* 9] Take your time with this step. It is the last step for squaring the Y axis :).
+[* 7] Place the frame flat on the table, ensuring that the reference corner is at the back left position.
+[* 2] Carefully insert the 290mm extrusion between the two Y extrusions, as shown in the 1st image.
+ [* 9] Be careful that you do not scratch or permanently mark the extrusions whilst doing this.
+[* 5] Apply pressure, in the direction of the arrows, as shown in the image, and fully tighten the M5 screws.