I need to cut some grooves in my sidewalk. They need be no more than
1/4" deep, though 1/2" might be better. They need be no wider than a saw kerf. All I need to do is run a small wire in the grooves and fill it with epoxy or something similar. This is for one of those "electric dog fence" type things.What's the best way to do this? The total length I need to cut is probably about 15 feet, so I don't need a particularly durable solution. Will a cheap masonry blade in a circular saw do the trick? Is there anything I can use in an angle grider? The angle grinder would be good for making a vertical groove on the edge of the sidewalk.