Compass Knob Button for Monoprice Select Mini

My MP Select Mini is my first 3D printer, and as you already know, the original knob button is really unusable. So after giving a shot to the [Better Dial](http://www.thingiverse.com/thing:1677768) by auralgasm and [its successor](http://www.thingiverse.com/thing:1729041), I felt that something was missing, and is the ability to use the dial with one finger (iPod Classic users remember?) as sometimes when the base is all the way forward, using the dial with two fingers can be difficult.

So, a