Really? I didn't realize that would work. That's good to know. Thanks! Unfortunately I don't believe it would work here because that diagonal roof panel is also arced at 7% to accommodate the arced outer wall, and I know that any arc at all causes a problem with doors and windows. You advised me about that with an earlier question I had.

With an arced wall that wouldn't work, only with a straight wall. From your image I thought the angled roof part with the windows was straight. A 7% arc is difficult to see on a flat image. If you could keep the part with the windows straight you could still try the window-in-wall method, otherwise you're out of luck.
By-the-way, that would mean that your windows also have a 7% arc?