in the sliced version it has no lever which would be preferred so that you can use the original arm for the hotend (I think, I have not tried it, I broke the 3d printed arm that took the pieces from the original so I bought a metal ender3 hotend and that works for me.) Would recommend having another 3d printer handy though.
The author remixed this model.
I added a bl/cr touch mount and I have assembled some of the upgrade for you