Hi again, These might be interesting – only one gun, unfortunately, but indicative of what was involved:- https://www.youtube.com/watch?v=kx2IQViUmkc https://www.youtube.com/watch?v=rkuSqE1HoCM (Fast forward to 2:30 on the second film.) Here's the King's Troop, RHA, doing it "en masse" in a public p...