Customized version of https://www.thingiverse.com/thing:5189611

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=5189611

Using the following options:

size = 25
die = 50
roundness = 0.000000000000000000000001
letter_ratio = .05
depth_ratio = .03
$fn = 4
kite = .01
angular_fudge = 3
radial_fudge = .125