Oh brother. I am a doofus with too much on my mind. 5 hours into my adventures outside today, work on the new butterfly garden, stuff trimmed up, garden work, and mowing. Mind you, the grass is about 2 feet tall. Because I was out of my usual mowing pattern and the tall grass, I lost track of one of the last lawn obstacles from the previous owner (septic cover with two big rocks). I was getting tired and didn't trim around it first, should have gone full stop before I hopped on the tractor. But no, now I have an inoperable mower deck beyond my ability to repair.