I already had done the AM8 upgrade so I printed only the minimum necessary to make this work. I reused the Y motor mount and tensioner from the AM8 build (until I replaced the Y mount with an AliExpress aluminum mount) and since I have a Gulf Coast Robotics Y plate I am using only one carriage on the rail on the right side of the bed.
The X carriage is my own design: Bondtech BMG + E3D V6 carriage for BLV MGN12
I mistakenly got 1/2" ID wire loom (about 18mm OD) instead of the recommended 1/2" OD wire loom so I had to redesign the wire loom adapters.
3D Solutech PETG