Except, today, I finally bought an impact driver. Seven years ago I almost dropped out of college when the construction crew I worked for said they'd give me an impact driver if I stayed. They almost won me over! Why has it taken me so long to buy one? It's a big purchase. There was a sale on the Makita combo kit, with the impact driver and drill, lithium-ion batteries, 18 volt. And so, finally.
And you'll notice a diagonal brace going across the rafters. It has a 18 gauge strap nailed the whole length, as well as wrapping down the sides, nailing into the other rafters near the ridge beam and to the corner toward the eaves.