I am starting to plan a large project for next year. We installed a large patio in front of a home this fall that has several paths coming off of it and running through the front yard landscaping. The customer has a large island that the drive way wraps around in front of the house. They would like to run a few of the paths through the driveway and connect the island to the current landscaping. I have never cut into an existing drive. Is there anything that I should watch out for in both the demo and install parts of the this project? The drive is poured concrete and is about 18 feet wide where the paths will be going through.