Soooooo, ChavaRX7 has a point, but everyone has their own point of view on how the FC Chassis is classified, but if it were up to most of us FC would fall into the OS category, simply because because of the chassis structure. Ask any RotorHead out there about what category they think the FC chassis falls under whether it be OS or NS (New Skool).. Lets see how many people say OS.. But then again, Glides has a point once that cars emissions is exempt, that's when it should be filed as OS..