In the process of replacing the wear ring on my Islandia. The brass vent plug's hex slot has been stripped by the previous owner/shop and I cannot remove it from the stator housing (the drain plug came out easily/was not stripped). I've tried using a flat head screw driver to no avail. Any ideas how to go about removing the brass plug w/out damaging the stator? I ordered replacement plugs when I ordered the wear ring.