Do you have build pics of this somewhere?I made a roll out 3' wide with 2 round holes with curtains in the front, no dividers and no nesting material at all. Just a very dense commercial carpet so the eggs roll out and every one lays in the box. I have seen 3 in at the same time but all 7 likely could fit if they wanted to. To make it a roll out I just sloped the floor and put a divider lengthwise about 8" from the back off the floor of box 3" for the eggs to roll under. I collect through a door outside the coop.
Gary