I was informed today that the tube can't be changed out on the 25th or the 26th of October, possibly on the 28th instead. I don't want to go into details, but good friends had actually organized for me to get my new tube at a hospital in Europe that actually has experience with these types of tubes. My return flight is booked for the 27th. Changing the date for the tube exchange means changing my flights and this means having to pay extra.... The tube that was ordered for me has also not yet arrived. And I should really wait for the tube to be at the hospital before I change my flights, but the longer I wait, the more expensive it will get.