Flattening out base of object using geometry nodes.
I have an object.
And would like the base to be flattened out using geometry nodes without having to type in each face index manually.
I know I can
0 but I'm having some trouble with geometry nodes since the shape is "awkward". (I would like a flat base since it will be 3D printed but I would like to flatten the base using geometry nodes)
My thought was to select the bottom faces do the
0 but I'm picking up other faces (see red arrows).
Any ideas how to select just the bottom faces and flatten them out?
I did look at Flattening out and dissolving faces using geometry nodes but the current shape I'm using has awkward angles that go back up.
Update: This is a continuation from this question. Calculating and aligning the angles needed to create different corner connectors to join / create various polyhedrons using geometry nodes
See attached Blend file.
Update 2: To answer Markus comment about providing multiple examples.
Blender file with the connectors.