The drain hole was drilled through the aluminum casing - so the magnetic drain plug won't catch any left over shavings from that procedure because aluminum isn't magnetic - unless there is some steel in the aluminum but I have never heard of that. I should see if the drain plug sticks to the case when I take it out next time. What the drain will catch is gear and bearing part deterioration I think since those parts are steel. Hopefully when I used the Q-tip to clean the inside area around the hole, I was thorough. Also - perhaps since the hole is at the bottom, any left over shavings will stay there. All good so far.
