Place the base of the frame on top of the Y Belt Assembly from the previous step.

Cap Head M5x30mm. Use them to fasten the belt holder to the Y carriage. Do not tighten too much for now, you want to be able to adjust the belt tension.

Place the motor and tensioner modules inside the respective profile slots. Adjust their lateral position to make sure the belt is completely straight and screw these modules tightly in place (blue arrows point to the screws you should tighten).

113.5mm measured from end of printed part to MGN12 Linear Rail. This part is centered, so the distance is the same on both sides. The "Y Support Nema" is not centered. On this part, distance to the linear rail is: 118mm (motor side) and 111mm (pulley side).

3030 Drop-in T-Nut M5. Slide them inside the slot until they are aligned with the holes on the printed parts.

Cap Head Screw M5x12mm. Tighten motor and tensioner modules with these screws.