hello Wolfgang, welcommen to flying giants.
i think i have seen info on this stearman here you man run a search. but from what i do know about balsa usa's kits they are top notch and very precise. one of thos emoki radials would make a plane like that truly amazing. Just wondering what part of Germany are you in. i used to fly segelfleger with luftsport in Kitzingen. good times
mike