Customized version of http://www.thingiverse.com/thing:219574

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=219574

Using the following options:

maximum_rotation_angle = 15
base = 1
v_ratio = 0.5
num_z = 4
num_x = 4
z_compression = 0.9
u_adjust = -0.15
master_seed = 40
W = 1
V = 2
U = 3
mortar = 1
bz = .5
bx_adjust = 0.1
by_adjust = 0.1