Robert Howle wrote:If you snap to floor u will still have to support that area in the middle of your model due to the horizontal surfaces not snapped to the floor.
True what Robert said I overlooked that. I am sorry
So I would attach one support to the side then go back to model mode and then snap to the floor.
Now you can open it up in support mode and the model will stay down and grow from the bottom and you can add supports under the model from the bottom.
BUT Beware!!!! Slice this model now don't move it whatsoever!!
when you go back to model mode DO NOTHING any change you make now will force the model up to the top of the supports and you have to start over so if your going to do several or plan on moving it after this it will move up and you will have to go back and remove all the supports and start over.