MK3 Knobs

Not sure if Thingiverse really needs another knob but what the heck... I'm not real fond of the knob that came on the MK3 so I've been looking for something to replace it. My first attempt was the bottle cap style, attached, but I quickly decided I didn't like it because it's a PITA to spin fast. Presently I'm using one based on the Open Source Hardware Logo. I like it because I can put my finger in the notch and spin easily.