Customized version of http://www.thingiverse.com/thing:811733

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=811733

Using the following options:

Spacing = 3
Roundness = 6
Rows = 3
build_plate_manual_y = 150
build_plate_manual_x = 150
StepSize = 12
BottomThickness = 2
circle_resolution = 50
HoleDiameter = 16
Columns = 5
build_plate_selector = 3