Noob mesh problems

Hi guys i’m new in the mesh modeling world in rhino and i’m stuck with this problem: how can i plug this hole when i split the mesh? i tried to create some patch between correspondents edges top-down the model and then i “quadremesh” it i still got some tiny holes in the mesh. is there another workflow that i miss? I would like to achive two parts that i can print in my small 3d printer. Any help is gratefully received

I would subtract a thin piece maybe 0.2 mm thick instead of splitting the mesh.

Use the mesh boolean difference command.

_MeshBooleanDifference

I had to run _SplitDisjointMesh afterwards to split the mesh in its two pieces.

Both meshes are closed

subtract-dontsplit.3dm (8.0 MB)

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thanks man i was hoping for a quick shortcut like that

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Martin’s fix is the correct way to go-

the nitpicky technical fix is to use patch single face to break it up into smaller holes. then use fillmeshhole to fill it in-

see this video