Filled water, engine checks, and on our way. Hailed Old Hickory Lock at 3 miles, but knew they'd turned it for an upbound tow. They told us 3 to 3.5 hours. We caught lines on an arrival cell--no current, wind, rings easy to reach. About 2 hours later we dropped lines and entered the lock. Really slow drop, then 10-11 kts down the river. Arrived in Nashville, great docking job by Jax. Upmost power pedestal wasn't working, so walked the boat back to the 2nd one. All smooth.