Nifskope breaks SCOLS causing issue when Scol is used in CK and visibility is generated

[GreekRage]

Any scol i try has the same problem once passed through nifskope edited or not..Simply saving the nif breaks it or changes something that the CK doesnt like resulting in problems when generating precombinedvisibility thus in game the know texture wall/plane glitch.
These same scols prior to being saved in nifskope work fine in CK and generating data...
Also note these are houses with several parts but i need to be able to do the re-textures in nifskope to make variations of the buildings.
My only work around is to make duplicates of each piece and retexture them separately in nifskope and then rebuild the structures/scols from scratch with the new retextured parts...which work fine with previs...
So question is...
What is nifskope doing to the nifs/scols when it saves (auto sanitize on or off has same result)...Simply opening the file and saving without editing "breaks" the scol as far as previs generation is concerned .