We flew with it back in April and took it as a carry-on. We had no problem, they just took it to a special machine for closer inspection---but we had it back very quickly.
We used a luggage cart to get it around the airport, but carried it on to the plane. The steward told us to put it in the first available overhead. (It fit perfectly in the 747 overhead.) This is a great idea because it is very difficult to manuveur it down the isle.
We had asked about pre-boarding, but they said we need a special notation on our boarding pass. Maybe you can look into getting approved for pre boarding before the flight so you don't feel rushed.
Good Luck!
We used a luggage cart to get it around the airport, but carried it on to the plane. The steward told us to put it in the first available overhead. (It fit perfectly in the 747 overhead.) This is a great idea because it is very difficult to manuveur it down the isle.
We had asked about pre-boarding, but they said we need a special notation on our boarding pass. Maybe you can look into getting approved for pre boarding before the flight so you don't feel rushed.
Good Luck!