Is there a good way to aim guns for fast gun ships on the bench? My Lutzow's guns are installed but not secured and move around a little, I would like to get them aimed and secured on the bench before the next battle.
I figure out where I want them to hit and then fire and adjust till there. Also think about how the ship rolls in the pond, some angles are much more difficult to reliably target than others just due to ship motion...
Here are a few examples. To get multiple guns to hit together I constrain both the breech and the barrel tip. I use 1” aluminum angle for the barrel tips. For triples I use math to figure out the desired convergence point, but generally I keep them all at the same elevation and toe the two outboard ones in some examples, using rods in the barrels to see showing convergence elbow holders, i print them into turrets but it can also be done with wood or other material example of dual sidemounts for single guns I use the same approach, it helps keep down angle and prevent movement from rubbing
A deck-mounted barrel brace is the most common solution by far. In your case though, since you've only armed one of the three barrels in each turret, you could install dummy barrels and use the dummy barrels to hold a barrel brace. Since the dummy barrels would be mounted directly to the cannon rather than screwed into an o-ring breech, it would provide a lot of support.