Hi,
I'm considering buying a windowsill made of some type of stone; Byggmax has several options, and the prices are reasonable.
The problem is that I want to install them "inside" the window, and they will extend slightly in front of and to the sides of the window.
So, I need to cut a small rectangle on each short side; there will be window reveals covering this later, so I have 16mm that will be concealed.
Is an angle grinder with a diamond disc sufficient?