Above when i used Form New part in Geoemtry, and the condition I already set in the picture. Please look through.

This one happen when I used Share Topology in Geometry, the meshing between bodies doesn't align as you can see in the pic and there is 4 overlapping region. is that a problem?

This one when I used create using Boolean in Geometry, some mesh align while some don't. There is also overlapping region.


Which one best used for my case as shown in the first picture?