Working on the design for the deckhouse armaments...
A typical Liberty ship, there are two gun tubs on the front of the deckhouse and two on the back. Notice that the rear tubs are supported with legs to a deck below:
View attachment 576526
The kit upper deck starts out with these parts:
View attachment 576525
The front tubs won't be too difficult, I'll just cut new deck pieces with a radius to support the tubs:
View attachment 576527
To make the tubs I found a piece of steel tubing that scales to an appropriate diameter in my metal scrap bin and cut short sections from it.
The kit deck doesn't provide a good place to mount tubs in the rear. I borrowed this image from Vic's thread and drew gun tubs on it to show where I'll probably have to install the rear tubs:
View attachment 576529
The rear tubs will have to be supported with legs like in the earlier photo and like this one:
View attachment 576530
Have to figure out the finer details as I construct the top deck but I think this will work out fine and will be reasonable prototypical and approximately what might have been done back in WWII to convert a ship like this to war cargo duty.