I’ve bought some of these to fit filler panels and cornices
https://www.googleadservices.com/pa...8uG03Ov4AhXQWMAKHebEAgwQzzkoAHoECAEQDg&adurl=...
Assembly joint not square
https://www.googleadservices.com/pa...8uG03Ov4AhXQWMAKHebEAgwQzzkoAHoECAEQDg&adurl=...
Assembly joint not square