Just went to a Ricky Tims seminar and Ricky suggested using a ceiling tile. Ricky covered his with a duck cloth. I have one that is fabric on one side, and the Teflon so steam a seam, stitch witchery or any of the sticky products peels off. the ceiling tile is first placed in a light batting made into a pillow case to fit it. This is much more portable than plywood. I have plywood on my ironing board. I covered it with an old wool blanket then with the silver ironing fabric. Like both of them.