The Doctor listened and then it hit him. He suddenly smiled from ear to ear and sort of pushed him out the way. Not intentionally, he was just a bit over excited. "Yes, that's it! Yes, and then we can move this fragment here to make up for the lack of central mass around each formation in this section, and here... and here!" he grinned, pointing to the screen. Turning his head, he smiled and raised his eyebrows. "We're good..."