Edit Vault Workshop Pieces

[spaceboy23]

What I need help with sounds simple enough, remove part of a vault workshop structure piece. Specifically I want to take the atrium inner corner bottom (VltWorkShopATRIUMCorOut01Low), duplicate it then remove all but the column and border: https://imgur.com/YgcWzNN.

 

So far I've managed to create the duplicate using Fo4edit and can sort of do the edit in nifskope by removing the floor block but when I try to place it in game the connect points no longer work. Doing it this way isn't perfect as the floor outline still shows but it would be good enough for my purposes.

 

My main question is can this be done using Nifskope or is another tool required ?

 

I also need to edit the Domestic and Utility prefab inner corner pieces in the same way to fix areas like this: https://imgur.com/P8V3sQX. This looks a bit harder as there is the ceiling part to deal with and the connect points are set up differently.

 

Obviously I am a total noob when it comes to modding but this seems like a good way to start and I would greatly appreciate any help.