All part of the expense running a safe professional outfit
Robin400 - Much as I would relish the opportunity, unfortunately commercial practicalities would never allow it...
There seems to be a lot of concern about pilot familiarity and understanding of the 135 fuel system on this thread from non 135 people. The system hasn't changed markedly from when I was taught about it 7 years ago and I am still happy with how it operates practically day to day as a pilot. I don't feel I need further training and as to all the minute design intricacies etc. I am happy to leave that to the engineers and boffins in white coats.
BC