hi.what you will need is - 18 inch long by 9 &1/2 inch wide piece of hard wood about 1/2 inch thick. 10 by 7 inch ply wood then 8 by 7 inch ply wood. 9 & 1/2 inch long by 1 & 1/2 inch wide bit of scrap its for the backside to hook it to the bench. 10 by 1/2 inch batten about 1/2 inch thick. x 2 glue... By: Utopia247