when you nudged, did you go to documents/Paradox Interactive/Europa Universalis IV/map/positions.txt and move it to documents/Paradox Interactive/Europa Universalis IV/mod/yourmodname/ ?
because the eu4 folder in documents acts as a MOD on entire game, try creating map folder and putting in a provincemap, and it should read it. it automatically places it there, creates a new map folder in documents part of eu4 and adds it there. for you it should be visible even after you disable the mod, but for us it is at old/unchanged positions, ports somewhere at land etc. by the way i added you to friends to contact about teut because i made a little mod myself where i fixed teutonic order and northern netherlands, could be great in your mod :)

@ratka I'm gonna see if doing that fixes things. An update should come later today.

Also I am going to fix provinces in the TO, such as making it so Ducal Prussia has a border on the Vistula river like historically

The Gumbinnen province in East Prussia does not belong to a tradenode.
Very nice mod thank you.