I have a Steelcase Amia office chair. It's comfortable and I like it quite a bit, with the exception that occasionally it develops a squeak when I lean back. The solution is to lubricate the tilt mechanism, which is under the seat pan.
Problem is, to remove the seat pan requires something like a gigantic flathead screwdriver to reach in and press a release tab (see photo), and it's a fiddly affair to do it just right. So I designed a simple tool that makes this incredibly easy.
Here's how to use it:
There's a good chance this tool could work on other models of Steelcase chairs, but I don't have a way to test this.
Print the tool with the notch facing up, and 10-15% infill is sufficient. It'll fit on a Prusa Mini if you rotate it 45 degrees when you slice it.
The author marked this model as their own original creation.