We tried and we failed
We got as far as half-way to Greenland, but with solid above, murky ahead and sea-fog building below (we were at 500') we decided to turn back.
Very frustrating, but the right decision. Next time (next year?) we'll give ourselves more time...
Film of trip here for anyone interested:
https://www.youtube.com/watch?v=116mtfTSNh0&feature=youtu.be
Fly safe, Sam.