pt 1 on A1, side-A inboard leg, bottom
35.756695  -54.206455  0.252345

pt 2 on A1, side-A outbd leg, bottom
81.490729  -48.502389  0.276572

pt 4 on A1, side-A outbd leg, top
81.493927  48.497611  0.253787

pt 3 on A1, side-A inbd leg, top
35.754164  54.193545  0.254995