I would like to book an award in J on Air India from Sydney but i am nervous that there might be a craft change at the last minute and i will no longer have a flat bed seat. I have bad arthritis and really worry about that long flight in a bad seat. It would be a United Mileage Plus award on a partner carrier, so there would be no way to cancel at the last minute. I know Thai doesnt bat an eyelid at craft changes and i realise it can happen with any airline. How much risk am i taking?