Some time back I purchased a china cabnet for my wife. It is made of maple with glass doors on top and solid doors on the bottom section. The bottom doors looked good, with a design in them which neither she nor I liked. Upon closer inspection I found the insert was made of plastic. Today I removed the doors, and removed the plastic inserts that are laid in place in a dado, with 1/8 plywood backing. Since the wood is maple and the size is 12x13.75 insert, I glued up some maple for carving. I am attaching the images of the carved inserts I came up with. Remember around the outside is for the raised panel routing once removed from the CW.