Not sure why the BotD is listed as Hard. I almost got it (4.7M) on my first try with Radar pattern, which I thought was one of the more difficult modes. Second try I put it on Straight/Fixed and got it no problem.
Managed to complete the story on day 14, though it could have been shorter as I had a couple "mishaps" (hit the ground with more than half fuel remaining). However, I didn't have all the achievements at that point.
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 "Flight"){kind=icon}