Customized version of http://www.thingiverse.com/thing:1626529

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=1626529

Using the following options:

holder_y_count = 1
taper_ratio = 1
holder_offset = 5
holder_y_size_space = 2
strength_factor = 1
hole_spacing = 25.4
holder_x_size = 80
holder_angle = 0
holder_x_size_space = 2
hole_size = 6.0035
holder_y_size = 30
holder_height = 120
wall_thickness = 1.85
holder_x_count = 1
holder_cutout_side = 0.0
corner_radius = 2.5
board_thickness = 5
closed_bottom = 1