Has anyone ever opened one of these York 210's up, specifically focused on round backing place on the rear (opposite the clutch)? Mine is leaking oil from the back side, and it appears to be coming from the base of the round plate. I don't know if that round bit is just a cover, or if its somehow integrated into the internals. I have these flat blade screw heads, so I don't have much that I can bite in to, and I've already broken a screwdriver head trying to remove it. The York 210 manual gets into details about removing the clutch and top ends, but nothing about the back. The leak is at the very bottom of the circle in the picture.