I have experimenting with props on my FC40. Phantom FC40 Phantom 2 prop guards FC40 camera with stock camera holder 2700mah Lectron Pro 35C batteries (highly recommended) Flytrex with Phantom cable LED Headlight 45 Flytrex missions equaling 390 minutes of flight time. I was not concerned with battery time, I was testing props. But I did get just over 10 minutes of flight time with each type prop with the noted batteries. I tested factory DJI 8" props (both balanced and unbalanced), DJI 9" factory props (both balanced and unbalanced) and Maytech carbon 8.4x4.3" (balanced.) My impressions; Maytech props - too much prop for my setup. Super stiff prop. Quad not heavy enough. Lots of prop wash. When I came down (heavy stick) the quad lost control, side-to-side and landed hard. Thankfully, I landed on a long grass with no damage. Overall impression: nice props but for a heavier quad. DJI 9" balanced props - Much, much more stable than the carbon Maytechs, responsive but more noise and flies full stick much slower than balanced 8" DJI props (verified by Flytrex data) DJI 8" balanced props - Best of the best for my set up. Goes up, comes down and everywhere I point it with precision. I can land the quad effortlessly within a foot of me without fear... Balanced vs. Unbalanced props = Stability I just bought a set of carbon Phantom 1 props (with nuts) no name off Amazon. I plan on balancing then and giving them a go. Dimensionally the same size props as FC40 stock 8".