Our 95mm capping piece was ripped to 85mm and bevelled with a 16-degree bevel on both sides. To do this, lay both sides of the frame together. Measure the distance between the two sides for the front and back width of the capping piece. Transfer these measurements to the timber. We ripped our timber to 85mm. Then measure and cut the timber to length for the sides. We gave ours a 16-degree cut at each end. To attach the capping, clamp it in place, pre-drill with the 4mm bit, countersink and screw into place with the 50mm screws.