Just to add a little more about the stock ports, i was just looking at them again with Lynn's new info in my head , and the reason that the trailing edge is off for the secondary, and then regains the housing at the aux is because the top edge of the secondary is scissor shaped (as Lynn described), where as the aux port has an abrupt closing. I had to modify my aux port templates, which were ported out thus dropping the trailing edge, so that they had a scissor top like the secondary port, and the ports Lynn describes. The stock primary has a scissor like closing edge aswell.