Leg 3 of this ferried flight takes us across the largest stint of water and barren Greenland. You'll be departing from Reykjavík and heading for Iqaluit. It's a little over five hours of flying at long range cruise speed of 252 ktas. Plan an alternate for Greenland incase something goes wrong. Once you've finished this leg of the tour, you will have successfully flown from Europe to North America in the TBM9.
At 1200 nm with four passengers, this is a safe range for the TBM with 1.5 hours of reserve fuel. You can view the range of a TBM9 over at tbm.aero. I've set an alternate for Nuuk Airport in Greenland in the event something goes wrong. You should pay special attention to wind depending on the altitude that you choose to fly. It's possible you may have a strong headwind and you will need to plan for more fuel.