Materials:
1600 linear mm of 2020 V Slot Channel
https://www.amazon.com/dp/B09DYMCBYF?ref=ppx_yo2ov_dt_b_product_details&th=1

Qty 10, 90 Degree Angle Brackets Interior Joint Corner Bracket for 2020 V (or T) slot
https://www.amazon.com/dp/B07PJ8H5ZQ?ref=ppx_yo2ov_dt_b_product_details&th=1

Cut the V channel into the follow pieces:

Qty 4, 148mm length 
Qty 2, 480mm length
Qty 3, 220mm length

Position and assemble as show. 

Materials:
Qty 1, 210mm 2020 V Slot Channel
https://www.amazon.com/dp/B09DYMCBYF?ref=ppx_yo2ov_dt_b_product_details&th=1

Qty 2, 2020 Aluminum Profile Pulley V-Slot Build Gantry Plate with V wheels
https://www.amazon.com/dp/B08NDMVM42?psc=1&ref=ppx_yo2ov_dt_b_product_details

Qty 2, 90 Degree Angle Brackets Interior Joint Corner Bracket for 2020 V (or T) slot
https://www.amazon.com/dp/B07PJ8H5ZQ?ref=ppx_yo2ov_dt_b_product_details&th=1

Qty 4, 2020 V (or T) slot Series Corner Brackets
https://www.amazon.com/dp/B095JSJTPX?psc=1&ref=ppx_yo2ov_dt_b_product_details

Qty 4, M5 T-Slot Nuts
https://www.amazon.com/dp/B095JSJTPX?psc=1&ref=ppx_yo2ov_dt_b_product_details

Assemble as shown

Materials:
Qty 1, 5202 Series Yellow Jacket Planetary Gear Motor (13.7:1 Ratio, 435 RPM, 3.3 - 5V Encoder)
https://www.servocity.com/5202-series-yellow-jacket-planetary-gear-motor-13-7-1-ratio-435-rpm-3-3-5v-encoder/

Qty 1, 3417 Series 5mm HTD Pitch Set Screw Pinion Timing Belt Pulley (6mm D-Bore, 16 Tooth)
https://www.servocity.com/3417-series-5mm-htd-pitch-set-screw-pinion-timing-belt-pulley-6mm-d-bore-16-tooth/

Qty 1, 3412 Series 5mm HTD Pitch Timing Belt (9mm Width, 890mm Pitch Length, 178 Tooth)
https://www.servocity.com/3412-series-5mm-htd-pitch-timing-belt-9mm-width-890mm-pitch-length-178-tooth/

Qty 1, Flanged Ball Bearing 6x15x5mm
https://www.amazon.com/dp/B07Z3F1MR5?ref=ppx_yo2ov_dt_b_product_details&th=1

Qty 4, M5 T-Slot Nuts
https://www.amazon.com/dp/B095JSJTPX?psc=1&ref=ppx_yo2ov_dt_b_product_details

Qty 1, Elevator axis motor assembly left mount (3D Printed)
See 3D print files 

Qty 1, Elevator axis motor assembly right mount (3D printed)
See 3D print files

Assemble

Mount to V Rail with the belt (not shown here)

With belt shown here

Materials:
Qty 2, Flanged Ball Bearing 6x15x5mm
https://www.amazon.com/dp/B07Z3F1MR5?ref=ppx_yo2ov_dt_b_product_details&th=1

Qty 4, M5 T-Slot Nuts
https://www.amazon.com/dp/B095JSJTPX?psc=1&ref=ppx_yo2ov_dt_b_product_details

Qty 1, Elevator axis front left pulley mount (3D printed)
See 3D print files

Qty 1, Elevator axis front right pulley mount (3D printed)
See 3D print files

Qty 1, Elevator axis front pulley (3D printed)
See 3D print files

Qty 1, M6 X 64mm screw + 1 washer + 2 nuts

Assemble (screw not show here)

Mount to V Rail with belt (screw and belt not shown here)

With screw and belt shown here

Materials:
Qty 1, Elevator axis belt lock, upper (3D printed)
See 3D print files

Qty 1, Elevator axis belt lock, lower (3D printed)
See 3D print files

Qty 2, M5 T-Slot Nuts
https://www.amazon.com/dp/B095JSJTPX?psc=1&ref=ppx_yo2ov_dt_b_product_details

Mount as shown with belt (belt not shown here)

Shown with belt (bottom view)