Who remembers the funny little plumb bob in the nose wheel well so we could see the adjustments to be made if the a/c wasn't level when doing a manual weight & balance chart. I suppose no one ever had to use it for real....did they?
The 717 still has it. It's for calibrating the numbers when doing a drip stick. Takes about 20 minutes for the bl#$dy thing to stop moving around (then a baggie throws in a bag and you have to start again!)