I have a job in which I am cutting at either end of the table. I am using a piece of wood across the center of the table to hold pieces in a fixture. In Aspire it shows my safe z as .23, however my clamp sticks are 3/4". Right now the bit is plowing through the stick in the rapid move, but I think the bit will break eventually. How do I adjust the safe z? Can I adjust it for this one job. Thanks.