Solved! Go to Solution.
Solved by jimormsbee. Go to Solution.
Solved by mathewkol. Go to Solution.
My first thought. However everything measures correctly in the original drawing.
Your second suggestion led me to the solution. I went back to almost the original drawing which for some reason now showed all dimensions multiplied by a factor of 12. I scaled everything by 1/12. I then created the contours which now were correct in all 3 dimensions. Thank you very much.