Well I decided to use upholstery tacks. I tried 1/4\" pointed staples and couldn\'t get them to go fully into the plywood. I had this box of no. 2 , 1/4\" tacks left over from an upholstery job I did on my Jaguar XKE seats. They seem to work best but I had to use an awl to pre set a hole for the tacks. Ken used a glue on his and used some tacks to hold it in place along with clamps to set it up with. The back side doesn\'t show so I decided to go the upholstery way. You may also consider using very small 1/8\" or 1/4\" wood screws. You can do it anyway you want.