Need help :Oriented trimmed surfaces are not parallel to x axis

Hi all,

I am trying to orient trimmed surfaces, but when oriented they are not parallel to x axis, slightly rotated.
I found that, I must use edges as orienting plane source but how.

Thank you for your help in advance. :slight_smile:

not parallel to x axis.3dm (7.5 MB)

oriented surfaces not parallet to x (18.8 KB)