Customized version of http://www.thingiverse.com/thing:330855

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=330855

Using the following options:

backing = 1
third_letter = R
second_letter = C
jewlery_loop_position = 0
thickness = 2
resolution = 32
jewlery_loop_thickness = 1
buildplate_selector = 0
letter_spacing = 1
border = 0
radius = 10
jewlery_loop_count = 1
first_letter = J
font_weight = 2