Here were the steps to make a 3-D tower. First I tapered the eighth inch central strut. Next I made four identical scimitars out of .030 styrene. I also made four pieces of the lower third of the scimitar. I glued two full-size pieces directly to the sides of the central strut, establishing the profile. Then came two of the small pieces, followed by two more full-size, and finally the last two small ones. (These helped create the 'flare-out' at the bottom.) You can easily see that I lowered each successive layer onto the ball of the Main Gun. What you can't see is that the circular cutouts at the bottom of the scimitar became smaller as well, creating a spherical hole to hold the ball.
Example 1. Here the pieces are separated, and surround the front four AP guns.
Example 2. Here the profiles remain attached to each other, in a flat plane. They surround the Main Gun.
Example 4. In the above three examples, the 'hand grip' portion touches the tower. Here they do not. Actually, if this is the way I go, I'll probably eliminate the tower. It is a little hard to see here, but the two pieces do angle back a little.