Hi David also one other note - if your model happens to be constructed only of separate boxes that have not been booleaned with one another (like if they are all individual "boards" with one simple box being one piece of wood), then you should be able to actually select them all and turn on control points for the boxes using Edit/Show pts and select points to move in the same way as the 2D curve case.

That's because you can turn on control points for a simple box solid since it has a simple structure where the surfaces of the box all coincide with the joined edges.

- Michael