Thanks guys! One thing I noticed is that the phantom 2 guards come very close on one side of the prop; there's only about 1/4" of clearance due to the angled prop and motor! Any thoughts on this aspect of using them?
I also bought the quick detatchable guards off Amazon. They seem nice and have ample prop clearance, but my flight time is even worse with them, only about 12 minutes versus 18 minutes with no prop guards.