Chisel & dry-clamp

4. With a chisel, make a clean mark across the two boards so that they can be realigned when turned through 90° to rout the second face.

5. Line up the chisel indents. The lines marked with an ‘X’ are the stop lines, so there is no need to mark out for the second row of grooves.

6. Square off the ends of the grooves as there will not be a shoulder on the panels to hide the ends of them.

7. Next, dry-clamp the frame together with the panels in place and mark out for the screws, avoiding the groove and panels.