Customized version of http://www.thingiverse.com/thing:125529

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=125529

Using the following options:

BearingRaceOffset = 0.15
BearingDia = 22
bearingOffset = 30
BaseNutDiameter = 8
RodDiameter = 9.525
GapTolerance = 0.95
showRod = 0
Pitch = 4
MountHeight = 21
CompressionNutDiameter = 8
BearingInnerDiameter = 7.9
BearingHeight = 7
CompressionBoltHeadDiameter = 8
CompressionBoltDiameter = 5
BaseBoltDiamter = 5