Stitch landscape components? (i.e. different LoD's)

Not to harp about poor documentation, but I’m completely lost on how there’s no solution online. Is my workflow incorrect? I’m trying to force lower LoD for distant areas to save on performance/build times.

Automatic LoD at -1 seems to automatically tesselate and stitch to adjacent components but curious how it’s done for manually set LoD’s

drag it out into an external program no verts want to be meting at lines use an envilope shaped edge boxes on the lod to give the same amount of lines and verts on each edge as the higher lod has this will stop ground showing splits