I have a unique question about cribbage boards. How deep do the holes HAVE to be? Reason I ask, I had a customer place a custom order with me today... he wants a pattern on both sides of the same board. So either I use a standard 3/4" thick board and make the holes like 1/4" deep, or I use a thicker board and make them standard depth which on my pattern is 1/2". Any advice on how to do this? Thanks.