With the window mounted on the left hand side of the table and secured around its perimeter, the outside of the window is measured using the integral slide and cut accordingly. A tilt capability of the table working surface enables ergonomic attachment of fittings using a screwdriver. On the right hand side of the table the “inner light” of the sash can be measured with the slide. This measurement is transferred to a moveable stop so that a corresponding bead can be cut with a precision mitre saw.