Help finding manga

[slirith]

Was an isekai/reincarnation shoujo(IIRC) in a fantasy setting where she made things like a steam train and cannons secretly.

 

[crazybars]

I think this one came up already.

https://mangadex.org/thread/186256



Was it Daites Ryou Koubouki?

 

[slirith]

yup, that's the one. thanks