Original sentence: In 1930, the company finaly struck gold with the FK-41 high-wing tourist monoplane.Koolhoven, Frits Koolhoven took with him the design of the  FK-30 "Toerist" light sportsplane original designed for NVI, but not built.The end came on May 10th 1940
Edited sentence: In 1930, the company finally struck gold with the FK-41 high-wing tourist monoplane.Koolhoven, Frits Koolhoven took with him the design of the FK-30 "Toerist" light sportsplane original designed for NVI, but not built.The end came on May 10 1940