The Extra Fun is designed by world class pilots Roland and Wolfgang Matt www.matt-rc.li . Manufactured in czech for 3Whttp://www.3w-modellmotoren.de it comes ARF and is a real beauty. It is especially designed for the 3W24 and a special muffler system. By the way, it is a real "low noise system". The plane flies wonderfully on pattern AND 3D but it is a very lightweigt and fragile construction. You have to be very smooth and careful on the sticks. I dont know if they have done modifications on the fuselage and elevator yet but i´ve seen two of them cracking in the air during 3D maneuvers. Seems like they had to save a lot of structural weight with tribute to the use of the heavier gas engine with muffler system.