Customized version of http://www.thingiverse.com/thing:1296619

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=1296619

Using the following options:

Hole_diameter = 6
Hole_ridge = T
Font = write/Letters.dxf
Text_Height = 4
sphere_diameter = 12
Text =
Text_Depth = 1
Rotate_text = 0
Text_Spacing = 1
Recessed = F