Entry and class details on www.thunderboaters.com. Pre-registration required by April 30. 5 boats to make a class. Offering Nitro RTR; SS Mono; B Hydro; B Mono; Novice P Ltd. FE; Sport 20, B Sport Tunnel; D Hydro; B Mod Tunnel; Open Hydro; Twin Hydro; Jersey Skiff; Sport 40; Gas Mono; Gas Sport Hydro; Thunderboat; Gas…