You can attach good looking rotors by extracting / separating it from other voxels and attaching it to another one. (Use VXLUTIL to do this)
Then you just copy an exisitng HVA Animation and adust it if necessary in HVA Editor. (Make sure it has the same number of sections from the voxel from which the HVA was copied)
Make backups before you do this!
And Yes, normals can be a real pain, especially when your voxel has rounded parts.
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