Firstly your group is double wrapped, so explode it to remove one layer of grouping. Then the object has no bottom face, so open the group for editing and copy the top face down and reverse it. [image: ZjRX_GIF26-04-20236-03-46PM.gif]

Yea.. I looked at TIG's slicer plugin, and that is exactly what he needs. Whoopsie! Only manifold solids? hmmmm... Then a new script will need to be written, or TIG will need to modify that one. Sorry.