[Al Skierkiewicz]

Dustin,
While that AMP connector line is pretty nice, you can't find contacts in the connectors you show that are rated for the currents you encounter on motors on an FRC robot. I believe the series 3 contacts are the only ones that come close. While using your design is not illegal, I would suggest that the addition of another set of contacts, adds another possible fault and higher series resistance to your motor connections in addition to the added complexity of construction and cost.