The stock LCD control knob for the MP Select Mini is terrible, so I created this better control knob as drop-in replacement. This knob is much easier to use and the pattern has maximum grip.
There are various other control knobs for this printer on Thingiverse, however I found some of these did not fit well or were not very grippy. I did a bunch of test prints for various hole sizes and designs to find one which attachedsnugly, but not too tight. I can't guarantee that your prints will be identical, but this one fit great for me.
Pry off the old knob using fishing line, dental floss, or as I did, using a sharp knife to gently rock each side until it came off.
I've also included the 123D Design file for anyone who might want to remix or modify.
The spike pattern comes out well on both 0.1mm and 0.2mm resolution, the spikes are slightly sharper and the fit is slightly looser at 0.1mm - print to your preference.
A few makers recommended to position so that the hole is up. I was able to print fine as-is without supports, but you can decide which way you prefer.