This nozzle tray has labeled partitions for nozzles going from 0.2 to 1 mm, with an aditional partition for creality style 0.4 mm nozzles. I had a few of those still laying around :). By sliding the sled to whatever size you have installed, you'll know what nozzle to slice for at a glance.
You'll also need:
The sled should just snap around the tray. The tolerance of 0.25 mm between tray and sled should allow for easy movement of the sled. Then you can mount it to the to top extrusion of your Ender-3. The hook along the top will hold it in place, while you install the two screws on either side
Have fun printing!
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The author marked this model as their own original creation.