Seaducer 47" and CMB 91RS for NAVIGA FSR-O races (oval course). The engine has moved forwards and fuel tanks (1.6L, from I Folkson) are now between radio box and engine. Large fuel tanks are mandatory, as FSR-O heats and final last 8 and 12 minutes, respectively, plus milling time. As compared to the previous setup (engine between radio box and fuel tanks), balance point now moves only a bit forwards as fuel amount decreases and hull lightens.