The foam backer rod will prevent the wet concrete mix from leaking under the drywall. Take the foam rod material and press it under the drywall.
The night before you grind your floors, fill a 5 gallon bucket with hot water and pour it onto concrete and don’t be afraid to saturate the floor.
Husqvarna generously provided us with a fantastic machine to grind our floors. It was about the size of a riding lawn mower!
The easiest way to remove the dust is to use a floor squeegee. Use the squeegee to push the concrete into piles and vacuum the piles.