These springs were originally developed for fliers that use a transmitter tray and long sticks. However, over the years many top pilots like Jason Shulman have found that these stronger springs help them to find center better during precision aerobatic flying. A major problem with today’s radios is the soft springs that come with them. For some flyers, these are OK, but most find that it helps to keep from getting undesired aileron or elevator inputs because the stick is so soft. Give them a try! They are designed to work with virtually all radio brands.
Radio South HD Stick Springs (3/pkg) (RAD1200)