Wish I'd read this post this morning instead of this evening. We were going up the flight and the lock above the tunnel needed emptying so the pound was high and the grab rail took a beating. What's really annoying is that back in 2014 I'd managed to scrape off a nav light in that tunnel. So today as I was shutting the top gate of the lock below after exiting I thought the pound looked high and asked myself the question "Shall I drop the pound a bit?", then thought "Nah, it'll be alright." But lets look on the bright side, at least I didn't bash the nav light this time.