If when running wires for new construction to maintain the 1 1/4" space yuo obvisously can't staple them next to each other, and the staples can only take 1 cable? Is it good practice to come in through the top of the box for an outlet and when running out to the next, go through the bottom over to the bottom of the next and then out through the top? and continue this around to all outlets? Also any recommendations for box sizes? 2X4 walls? Should I get the largest? except for exterior walls where you may want to get insulation behind?