Customized version of http://www.thingiverse.com/thing:54024

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=54024

Using the following options:

KnobHeight = 20
ShaftDiameter = 10
ShaftLength = 20
CapType = 0
RingMarkings = 1
RingWidth = 10
TimerKnob = 0
NotchedShaft = 1
Pointer2 = 1
Pointer1 = 1
KnobDiameter = 20
HoleDepth = 10
HoleFlatThickness = 2
ScrewHoleDiameter = 0
Knurled = 1
TaperPercentage = 10
HoleDiameter = 6