I started out in the trades right before the cordless revolution, when many of us had at least two corded drills: a powerful 1/2-inch one with a side handle for the big stuff and a lightweight 3/8-inch model for the rest. Just because we've ditched the cords for most of our drilling and driving doesn't defeat the logic of having both sizes. I was reminded of that recently when I used my 1/2-inch 18-volt Milwaukee hammer-drill - which weighs 6.2 pounds - to bore lots of 1/8-inch pilot holes in composite decking and cedar; a lightweight 3/8-inch cordless drill/driver would...