I stepped wrong in our utility room the other day and stubbed my bare toe against the side of the toolbox I inherited 40 years ago from my father-in-law. That stung a bit, I’ll admit. Why wouldn’t it? Paul Gust’s ancient toolbox is the original immovable object. It’s made of sturdy, blue-gray metal, about 28 inches long and 10 or 12 inches high. My toe didn’t budge it. It occurred to me, as I was hopping on one foot for a few seconds, that I sho…