Customized version of https://www.thingiverse.com/thing:1603773

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=1603773

Using the following options:

TEXT_L = J
TEXT_R = Y
FONT = Liberation Mono
SIZE = 36
TEXT_SCALE_L_W = 1
TEXT_SCALE_L_H = 1
TEXT_ROTATION_L = 0
TEXT_SCALE_R_W = 1
TEXT_SCALE_R_H = 1
TEXT_ROTATION_R = 0
TEXT_OUTLINE = 2
TEXT_ALTERNATE = no
TEXT_CUT_OUTSIDE = yes
SHUTTER_SIZE = 0.8
SHUTTER_DISTANCE = 1.6
FRAME_THICKNESS = 3.5
GLASS_THICKNESS = 1.5
TEXT_CUTDEPTH = 1