I've never been happy with my window adjustment. So for years (about 8), I've told myself I would do it during the winter. The wife is visiting family in the Phillipines, so what the hey! How hard could it be? Haha What a pain! But I believe I got it. All in all, about 2.5 hours. I can say the Fisher body manual was not much help. I had some air leaks to begin with. I adjusted and sat inside while a friend shot air at 40 psi from about 6 inches. Further adjustment because had air coming in. Now I got it. Hope the air at 40 psi is enough to simulate wind at speed.