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:

Pointer2 = 1
Pointer1 = 0
NotchedShaft = 1
RingMarkings = 0
CapType = 0
KnobDiameter = 20
RingWidth = 2
ScrewHoleDiameter = 0
KnobHeight = 20
Knurled = 0
TaperPercentage = 40
ShaftLength = 0
ShaftDiameter = 6.6
HoleDiameter = 6
HoleDepth = 13.5
TimerKnob = 0
HoleFlatThickness = 0