This is why I prefer software solutions for ship design. I can write, I can draw, but maths has ALWAYS been a curse.
Don't feel bad, this stuff is fiddly and complicated.
If it's any recourse, I have over 300 lines of code written just to create an FF&S Mass Driver.
Gun sights, ballistic computers, homopolar generators, then the actual gun itself. And this is not done yet. Still need more maths. For example, I need to still, among other things, total up the volume of the finished gun.
I have a further 200 lines so far in to building a laser.
And the presentation could certainly be clearer, not all of the information is in the tables or stand out formulas, there's note buried in the text. (Did you know that indirect site on Mortars are 1/2 prize/size of regular guns?)