Hand logging forces you to actually notice when a flue starts drawing weird, a spreadsheet never will.

This is the same thing I see everywhere, guys spend money on gadgets when the old school way already works fine. My grandpa framed houses for 40 years with nothing but a square, a pencil, and a chalk line, and those houses are still standing. The clamp on the 2x4 is the whole trick, keeps the square from creeping on you halfway through the cut. Fancy jigs are handy for repeat work but they are not magic, the layout is still on you.

Man, I've stared at boring gray skies a hundred times and never once called the drop like Dale did.