Big Jerm went radically retro with the Thunderbird this year. The Koling Thunderbird is just stiff enough for all the flicks while being soft enough to give you all the feel in the flight plate one would need to smash a backhand. As the Koling Thunderbird is known for, these have a bit more stability than your standard Thunderbird. A substantial portion of each sale will benefit Jeremy Koling and his touring efforts.