The lads at Lockheed are experts at solving virtually impossible tasks.
The came across the same thing with the U2 and SR71 which were incredibly complex for their day, especially the later which was something near incredible!
On the SR71 they actually had to develop new manufacturing processes for materials that had never been used before - along with newly designed machining tools, machines and fabrication methods.
It was all trial and error and they did it in record time.
Yeah, that was years ago but never underestimate the Lockheed Corporation.