Hello there just a warning you will need a precise printer for this, and your bed will have to be leveled if you want everything to fit.

This is my 3d model if anyone uses this model for commercial use then report them or something idk.

I am the original creator of this model I published it on Printables too.

If you see this model anywhere else that isn't printables or maker world report them, please.

Assembly:

Here are all the things you need.

First put the spring in.

Then put the wheel in.

Then put the cover on.

Then put the cap on make sure the hole in aligned.

Then put a piece of filament in.

Clip the extra off.

And there you have it!