Ah yes, i should have provided the coordinates in the first place.
Varlais Caverns: X 67230; Y -103242; Z 15889; Cell 16,-26; Block 0,-1; SubBlock 2,-4
Tree: X 70863; Y 39996; Z -8178; Cell 17,9; Block 0,0; SubBlock 2,1
The issue with the water lod is sad, as it ruins the great view a little but at least it seems I didn't mess it up
A side note, as the guide has been changed in the mean time and i started 2 weeks ago:
Due to compatibility issues of some mods I'm using the 1.5.97.0 executable and binkw64.dll but my other files are the patched steam version.
Maybe the current WIP guide version wouldn't produce the above shown glitches.
I also added Rudy ENB but I haven't to my knowledge added anything related to textures or meshes related to trees, mountains or terrain in general.