flipflop
Great machine. I went to Italy to do the course and then flew the first one here in Oz. Only got up 50 hours but loved every one of them.
When you ask about the 3 tanks, the standard system with the upper, left and right tanks hold 486 kgs. That's 246 kgs in the upper and 120kg each in the lower cells. There is an option for 2 additional 106 kg aux cells that fit behind the rear pax seats.
I found the FBO @ around 70% TQ at sea level to be 190 litres per hours (152 kg) so you'll be able to work out the math.
I found it was a pretty dirty ship for exhaust on the boom, and as with any similar helicopter, I imagine that after time it would have an effect.
Rotor brake option was under developement when I was in Italy 12 months ago.
If you get a chance fly one. The first single I have found that the engine outperforms the airframe. A real 140 knots cruise.
As suggested, talk to the lads at Careflight as they will have more experience on the type.