Can The Coper work when my corner is more or less than 90 degrees?
Yes. The Coper back cuts at about 2 degrees, so it will work in every corner. If you ever find a corner where a larger degree of back cut is required, simply place a thin piece of wood or plastic (1/8″) under the front of the board before you clamp it down. This will angle the baseboard up to give you a greater back cut. Some routers will allow you to tilt the base of it to create more back cut.
