Customized version of http://www.thingiverse.com/thing:13505

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=13505

Using the following options:

m = 27
n = 20
t = 0.4
w = 12
h = 8
pi = 3.14159
r2 = 25