Stove Knob (USA GE stove)

My stove knob is broken, so I print one replacement.
There are some variation knob you can find at:
http://www.thingiverse.com/thing:1366
http://www.thingiverse.com/thing:1962
http://www.thingiverse.com/thing:7348

Mine design has solid body with a square hole on the bottom.
I made the hole smaller than the axis to get better fit.