Just bought the new hangar and the mule

So i bought both. Is my "floor space" still limited to 2 large spaces? I have the b11 and avenger in my "large" spaces. Is the McKenzie airfield only for actually storage add on and no floor space? Will my b11 have to be stored and striped of the upgrades i put on it? The mule is worth way more than the b11 for usage so ill eat that "mistake" if i need to but if im missing something id love to know so i can buff this new heli and still have access to a modded b11.