Truly exceptional, FruitBatFlyer. Just like to add one more thing; If you do have a problem in the aircraft while flying, opening up the MEL is always an option for information gathering, but if you decide to follow the limitations, you can end up in an uncomfortable situation.
Suppose you have this problem while flying at 35000 ft, 1/4 of the way on a 4 hour flight. If you decide to descend to 25000 ft, you may have a range problem. So, be carefull on what you choose to do. In this case, I will only descend to 25000 ft if the cabin altitude cannot hold. This problem is quite pervasive in our airline a few months back. Engineering seem to have solve it now but its just a matter of time before it comes back...