Stay away from TowerPro servos! Trust me, they're not worth the albeit small amount of money you spend on them. I've only tested the 995's, but I'm guessing the other ones are similar. I've heard that their longevity is poor, but I never bothered to use them in an airplane after testing them. They over-shoot their end points and center position horribly and consistently. I have never heard of a positive experience with them.