Your answers are always noteworthy. Keep up the great work.
The 1943 bulwark surround for three single 20-mm guns on the fantail (vs the 1945 bulwark for two twin 20-mm guns) was a standard design based on the standard working circles for single 20-mm guns of 10-ft diameter. As such, the design was more or less common on all FLETCHER's equipped with three 20-mm guns on the fantail (some early FLETCHER's were lost before this could be installed). But, each builder of FLETCHER's and USN yard that modified them, had unique variations on details (locations of the ready use ammo boxes, barrel cooling tubes, whether there was an elevated floor, and bulwark construction (exterior or interior ribs) and height.
I don't have a detailed drawing or overhead views of the bulwark installed on USS KIDD, but here are a couple of drawings I do have that show the general arrangement of the installation.
The first overhead drawing (from BGP) shows the installation on USS SCHROEDER (DD-501) as installed by NYNY.
The second drawing shows the installation on USS McCORD (DD-534). Note that the location of ready use lockers and shape of the bulwark "aft" are different.
The third drawing, shows the same bulwark installation for Bath Iron Works (BIW) built FLETCHER's starting with USS ABBOTT (DD-629).
Here is a view of USS KIDD's fantail as she was completing fitting-out at NYNY. You can see the fantail bulwark and note the general arrangements. The bulwark has internal ribs and a ready-use ammo boxes like USS ABBOTT, McCORD's, and BIW drawings above. The three cooling tubes are grouped together on the forward bulwark on the starboard side. Also, if you look close, she has an elevated platform installed so that the crew and equipment would be elevated from flooding in what could be a quite wet location. An additional note, the guard rails were removed once the Mk 14 Gunsights were installed on the 20-mm guns.
You can derive the dimensions by realizing that the working circles are 10-ft diameters and notice that they butt together in two places. The port and starboard 20-mm guns are 6.5-ft off the centerline. These two 20-mm guns are roughly 6-ft from the back edge of the aft hatch. Then the aft 20-mm gun is roughly 94-in (~8-ft) aft of the other two 20-mm guns.
I suggest that you draw the layout before doing any cutting, since I had to do some scaling to get these dimensions. As a further note, if you have drawings with the frame numbers, they are 21-in apart.
Any chamber on the deck of the model you are working with, will make the bulwark tricker to sit.
I am finishing up my 1/96 scale 1943 Kidd. The problem is that most of my plans are for the 1945 version.
I have side views of the gun tub near the stern near the depth charges, but no overhead drawings.
The 1945 version looks like a Lionel track oval. The 1943 version is triangular.
Anyone have such a drawing? I only need the gun tub.