Recently bought a Toro 20095 and when changing out the oil after the first 5 hours, using the drain plug, rather than the fill tube, not only had to remove the metal yoke around the belt, but a metal plate that is also held on to the underside of the deck by the same two screws as the metal yoke. What is the purpose of the metal plate? On my Toro 20039, I had the same metal yoke, but no metal plate. There was lots of grass clipping built up between the metal plate and the belt. I know that I can drop the oil without removing the yoke and plate, (as well as the blade),but it makes for an easier removal of the drain plug. What is the purpose of the plate? Is it necessary as my 20039 did not have the plate and never experienced any problems. Would be interested in getting some input from some of the Toro experts out there. Thanks !!!