Customized version of http://www.thingiverse.com/thing:128069

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=128069

Using the following options:

build_plate_manual_y = 100
build_plate_manual_x = 100
custom_length = 70
wall = 1.5
cells = 2
type = custom
build_plate_selector = 0
custom_diameter = 20
space = 1.5