All ARC's need to be inflated before launch, the more air in them the easier they are to launch.
For a limited amount of air, push the air to the wing tips, and hold bar in, on launching.
Pulling the bar in opens the wing tips, and slows it down, so it shouldn't over fly, invert, or bow tie.
All sled style kites lose about one third of their area to stability.
So, yes, the projected size of the 6m ARC is about 4m.
ARC's like to be powered up, so it will be used when other kiters are on 3m fixed bridle kites, and de-power to when they are on 2-1.5m kites.
Don't bother using it in under 20 knots, if you wish to buggy.
I have had my 6m Phantom mark one all the way to a recorded 52 knots of wind, and 98.5kph!!
Now just need some wind stronger than 20 knots to try the 6m mark II Phantom out!!