I am making a door with vertical grain cedar attached to an MDF core (please see photo). Because of the design, there are a number of directions that the wood will expand/contract. I am wondering if there is a better way to attach this wood to the mdf core besides nails or glue, to allow for more movement. If I resaw the cedar down to 1/4" thick or thinner, would this fix any cracking issues? How thin should i go?DOOR.JPG