Hey Bob, I personally would not stack cut two Layers of 1/2" hardwood. I think it would to thick to save any time by stack cutting. However if you wanted to try it, I would go with a FD UR #7 or #9. As for making the stack, you could use clear packing tape, but my favorite technique is to use a hot glue gun to glue the edges of the boards. Works good for me.