master airscrew props aren't my prop of choice. when you bring it up to full throttle, the tips sometimes bend forward making a buzzing sound. they don't have a lot of power, and they do vibrate a lot, balanced or not. i would reccomend apc. they are more expensive, but you get a lot of power, they are so much quieter it isn't even funny, and they are a fiber/plastic prop and are really tough. they aslo come pretty well balanced