Just purchased a mulching kit for my 36 Metro. What should I expect with it? How the heck to you sharpen the blades? The plan is to grind up light layers of early fall leaves to prevent bagging. I do have one high end account (Zoysia) that I bag. Will I be able to get good results from mulching instead? What is the normal install/remove time for this kit? Last question! What's in a name? Where did the Exmark name come from? Where they a private company before Toro bought them?