About 15 years ago we had a carpenter install soapstone countertops. The attraction was that he could fabricate them on site with diamond-blade woodworking tools. Now, 15 years later, our slide-in gas range is puttering out, and the new one we've ordered requires a cutout about an inch deeper than the range we've got. There's about 4" of soapstone behind the current range, connected to a counter-depth piece to the right of the range, making an "L" shape, if you see what I mean. We need to make the narrow leg of the "L" about 3" deep rather than about 4". Would there be a reasonable way to do that in place, or will be have to remove that piece of countertop, cut it (outside, I suppose), and then reinstall? If it can be done in place, any idea how? Router? Dremmel? Etc. Thanks for any thoughts.