A replacement fader knob for a Radio Shack 5-channel mixer (model 32-1200A) but can be customized to change the look, or work with other sizes of fader.

The OpenSCAD source is moderately parametric, so this is easily customizable, but the customization for the indicator line on top doesn't seem to work with customizer :(

You can change the size of the top or bottom rectangle, change the index line in the top, or adjust the size of the cutout in the bottom to fit your console.

Yes, it's simple and easy - in its default form, it is a perfect drop-in replacement for the classic Radio Shack 5 channel mixer.