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_x_size_space = 2
corner_radius = 0
wall_thickness = 1.85
holder_angle = 0
hole_spacing = 25.4
holder_x_size = 50
holder_y_size_space = 2
holder_y_count = 1
holder_offset = 5
taper_ratio = 1
board_thickness = 5
strength_factor = 1
holder_y_size = 50
hole_size = 6.0035
holder_cutout_side = 0.0
closed_bottom = 1
holder_height = 11
holder_x_count = 1