So there are a lot of replacement controller knobs out there for the MP Select Mini and I tried many of them but none of them were what I wanted personally. Sure they worked fine, but I wanted something that kept the original knob top and could still be used with the bed over top of it and one that made spinning the knob easier like for moving the axis or activating the extruder and I wanted something taller as well as I found it just makes using the knob easier.
The 3D printed something useful for today is a new knob for the Monoprice MP Select Mini 3d printer. I love the fact that I can print parts for the printer on the printer. Anyway, the control knob on the printer really is hard to use so people have come up with new ones and I like this one the best as it uses the original knob as well in its design.