What an rare helmet, congratulations Amy, again
Normally, I would suggest to leave the helmet as is, but I agree with you because I think this liner isn’t original. The slit is not directed towards the middle of the front/back and I don't think that any helmet was so carelessly made back then.
Here are mine
Active officers
one in gilt the other regulations were to have all Dragoon helmets in silver except for
the 1 Garde Dragoon Regt which would remain gilt
You have the super reserve officer.
Steve