Is it maybe possible to union a mesh?
You can’t union a meshpart or a specialmesh but you can export them as a mesh and reimport as a meshpart.
Meshes cannot be unioned, because they are different classes.
UnionOperations are not
MeshParts and the other way around as well.
Workarounds are little tedious, but it’s easy to get by once you have a foothold on it.