Best practice with inconsistent "à 2"

[Urs Liska]

Hi folks,

I have a large romantic score in front of me. In the handwritten score 
the \partcombine stuff is done inconsistently for unisono sections: 
sometimes it's written as one voice with "à 2", sometimes as two voices, 
i.e. one notehead with stems up and down. So far I can't see any reason 
for this inconsistency.

What would people with more experience with orchestral scores suggest:

- transcribe everything as it is in the model?
- make it consistent:
  - use "à 2" always?
  - use voices always?

Best
Urs