can't tell about other maniacs, but in my book it is fine.
one other detail - when I read of the foreign legion cavalry which was installed after WW1 (a lot of former white russian cavalry apparently enlisted), it is said that with the summer uniform (sand khaki) they would still wear the winter heavy cloth pants (khaki moutarde), "like the chasseurs d'Afrique did".
I don't have neither a source nor an example for that, I am trying it out on my dismounted REC though.
I also don't know if they wore the gandourah, the legion cavalry and mounted companies did.
what figures do You use?