Customized version of http://www.thingiverse.com/thing:114247

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=114247

Using the following options:

ring_height_step = .5
Build_Plate_Manual_Length = 100
pin_cap_gap = .45
center_radius = 12
font_depth = 2.5
Build_Plate_Type = 0
pin_radius = 2.45
font = write/Letters.dxf
Build_Plate_Manual_Width = 100
element = Cu
ring_spacing = 2.5
ring_height = 6
mesh_resolution = 70
pin_hole_radius = 3
pin_cap_width = 4
ring_width = 5