Printed on my new MK4 (kit) and it's absolutely perfect. Yup, both the print and the printer.
I love how perfectly the knob fits on the screw, just the right amount of clearance. Great job on the original design!
The author remixed this model.
I was concerned about sandpaper slippage, so I added some rails to pinch the paper better. I also provided extra labeling for the US crowd.