Customized version of http://www.thingiverse.com/thing:113015

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=113015

Using the following options:

ring_width = 5
Build_Plate_Type = 0
Build_Plate_Manual_Length = 100
center_radius = 6
number_of_rings = 3
Build_Plate_Manual_Width = 100
ring_height_step = .5
pin_cap_gap = .45
ring_height = 6
pin_cap_width = 4
mesh_resolution = 70
pin_hole_radius = 3
number_of_electrons_on_ring7 = 1
number_of_electrons_on_ring6 = 1
number_of_electrons_on_ring5 = 19
number_of_electrons_on_ring4 = 32
number_of_electrons_on_ring3 = 18
number_of_electrons_on_ring2 = 8
number_of_electrons_on_ring1 = 2
number_of_electrons = 79
pin_radius = 2.45
ring_spacing = 2.5