Originally Posted by iblumberg
I really like the KO 2123. It is very fast and because it uses a separate 7.2v line, you don't have to worry about your BEC voltage being low and slowing down the servo. This KO is lightning fast and quite strong. In my use it has always centered well and I've never had the settings wander.
Yup, it's only one of the fastest, if not THE fastest servo out there.