I acquired (free) a wooden hand plane. It is approx. 8" long. I don't know anything about it except is has a Stanley iron and chip breaker. The sole is not flat front to back. The gap is +/- .005" at most. Does anyone know what brand this is? Do I need to flatten the sole? If I do flatten the sole with what do I refinish it?P1010407.jpgP1010409.jpgP1010410.jpgP1010408.jpg