Customized version of http://www.thingiverse.com/thing:158717

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=158717

Using the following options:

connector_type = inline
strength = 1.0
inline_junction_width = 0.8
output_units = Metric
input_units = Metric
inline_junction_type = round
input_size = 4
outputs = 1
inputs = 1
output_barb_count = 4
vault_support = yes
vault_connector_ratio = 1.8
input_barb_count = 3
vault_wall_thickness = 2.0
output_size = 2