
- 2x T-Slot extrusion 40120 - 120mm
- 2x Extruded 90º Corner for 40 series - 8040 Tall - Black
- 4x M8x20 Cap Head Screws
- 56x M8x18 Cap Head Screws
- 2x Rat Rig Mill - Z Side Plate
- 60x M8 4040 Drop in T-nuts
- 60x M8 Washer
- 2x T-Slot extrusion 4080 - 400mm

- Repeat the following steps to assemble two Z-side plates, Make sure the second assembly is a Mirror of the first.
- Rat Rig Mill - Z Side Plate
- 28x M8 Washer
- 28x M8x18 Cap Head Screws
- 28x M8 4040 Drop in T-nuts
- Assemble the components as shown.

- Extruded 90º Corner for 40 series - 8040 Tall - Black
- 2x M8x20 Cap Head Screws
- 2x M8 4040 Drop in T-nuts
- Assemble the components as shown.
- 1x T-Slot extrusion 4080 - 400mm
- Fasten the Extrusion to the Z side plate, ensuring it sit flush with the Z side plate edges.
- Assemble a second mirrored Z side plate, as shown.

- Z right side plate assembly
- Fasten the assembly using the lower M8 screws.
- Ensure the extrusion is square with the Y-axis extrusion. Take your time to align this as best as possible.

- T-Slot extrusion 40120 - 120mm
- Using the marked screws, secure the extrusion to the right side Z plate.

- SN04-N2 Proximity Sensor
- 2x M12x25 Cap Head Screws
- 2x M3x18 Cap Head Screws
- mill_z_endstop_mount assembly

- 2x M3x18 Cap Head Screws
- SN04-N2 Proximity Sensor
- mill_z_endstop_mount assembly
- Attach the endstop to the mill_z_endstop_mount assembly
- 2x M12x25 Cap Head Screws
- T-Slot extrusion 40120 - 120mm
- Assemble the Z endstop mount to the T-Slot extrusion 40120 - 120mm
- Take care not to over tighten the screws as you can damage the printed parts.

- T-Slot extrusion 40120 - 120mm with Z endstop (from the last step)
- Using the marked screws, secure the extrusion to the right side Z plate.

- Z left side plate assembly
- Fasten the assembly using the lower M8 screws.
- Fasten the assembly to the small Z tower extrusion using the marked screws.
- Fasten the assembly to the small Z tower extrusion using the marked screws.
- Ensure the extrusion is square with the Y-axis extrusion. Take your time to align this as best as possible.

- Rat Rig Mill - Shield panel 1.2mm v1.2
- mill_z_tower_top printed part
- mill_y_axis_rear_cover printed part
- 4x M12x15 Countersink Screws
- 2x M8x16 Cap Head Screws
- 2x M8 4040 Drop in T-nuts
- 4x M3 4040 Drop in T-nuts
- 4x M3x12 Cap Head Screws

- Z tower assembly
- mill_z_tower_top printed part
- 4x M12x15 Countersink Screws
- Assemble the tower top as shown.
- Take care not to over tighten the screws as you can damage the printed parts.

- mill_y_axis_rear_cover printed part
- 2x M8x16 Cap Head Screws
- 2x M8 4040 Drop in T-nuts
- Assemble the Y axis rear cover as shown.
- Install it on the Z tower, making sure it is sitting flush with the Y axis extrusion and Z tower extrusion.
- Take care not to over tighten the screws as you can damage the printed parts.

- Rat Rig Mill - Shield panel 1.2mm v1.2
- The panel is reversible, there is no correct side to install it.
- 4x M3x12 Cap Head Screws
- 4x M3 4040 Drop in T-nuts
- Install the shiel panel on to the Z tower.

- SN04-N2 Proximity Sensor
- 2x M3x18 Cap Head Screws
- 4x Leveling Feet for 3030 - M8 x 30mm
- 4x Hex Locking Nut - M8

- SN04-N2 Proximity Sensor
- 2x M3x18 Cap Head Screws
- Using the M3x18 Cap Head screws, fasten the endstop to the right Z side plate.

- Leveling Feet for 3030 - M8 x 30mm
- 2x Hex Locking Nut - M8
- Feed the feet screw trought the Extruded 90º Corner for 40 series - 8040 Tall - Black from the bottom and thread the Hex Locking Nut - M8, it's a tight space, needle nose pliers might be useful.

- Leveling Feet for 3030 - M8 x 30mm
- 2x Hex Locking Nut - M8
- Feed the feet screw trought the Extruded 90º Corner for 40 series - 8040 Tall - Black from the bottom and thread the Hex Locking Nut - M8, it's a tight space, needle nose pliers might be useful.

- Rat Rig Mill - Z Plate
- 4x M8x12 Low Head Screws
- Ensure that the screws are inserted from the same side as the M8 screw head slots on the plate.
- 2x M8 4040 Drop in T-nuts

- Place the Z plate on the Z tower as shown.
- Ensure the M5 slots are facing upwards.
- Ensure the Z plate is flush with both Z side plates before tightening the screws.
- Tighten the M8 Screws to secure the assembly.