Ender 3 X Gantry Leveling/Alignment Tool

This tool is used to align your the X Gantry on an Ender 3 with the base.

See the video Alex Kenis created here:
https://www.youtube.com/watch?v=AN0MlQMMew0&t=1354s

In this video Alex used CD cases to level the gantry. These tools perform the same function simply clip to the front of the vertical extrusions on either side of the frame so you don't have to hold them in place.

Note my printer in the photos has been heavily modified. Custom hot end duct, cable chains, rear electronics box, dual Z steppers, direct drive etc. These tools should still work with a stock Ender 3 though.