I am replacing certain boards on my deck. As I try to remove a corner post, I notice there are bolts and deck screws. The bolts are easy to remove. The heads of the deck screws break off very easily. Any suggestions as to how to get those screws out of there now? They are beneath the wood surface, so pliers and grips will not work. Besides getting a long enough blade for my reciprocating saw and hoping it will fit alongside the corner post from under the deck....any suggestions?