Rebuilding ships - odd results, excessive weight savings

[polyarmus]

1920, VL game, Japan, 1.04, year is 1935

Issue: In some cases I am getting way too high weight savings when rebuilding ships:

Battlecruiser class Asama, originally from 1916

Modernized in two waves, three ships underwent last modernization in 1931 and one in 1935 (one is being rebuild). The rebuilds are not identical, but they are very similar (main difference being extra deck armor on the 1935 mod).

What is odd is the difference in weight remaining when I open these two designs for rebuild:



You can see, that one of them has over 1100 tons of weight remaining. That is without any modifications to the design (and it is "open for rebuild", not "open design"). I do not remember how much weight remained when I created this 1935 modification, but it definitely was not 1100+ tons.

When I use "Open design", I get 1900 (1935) vs 1100 (1931) weight remaining.

One of my battleships exhibits the same error. It is also 1935 modification.

[tbr]

You have done an ammo refit (-25RPG*8 13inch guns, 450 tons+ ammo weight alone, there are likely second order effects on armor) on the "lighter" redesign and gave it extra deck armor which is not on place when you do "open design". you also have 4 secondaries less. So the 800ton difference in "open design" is WAD.

In case of the "rebuild design" the difference is mostly due to the machinery refit you did on the "lighter" design with "Speed" setting, that is 540 tons in weight alone. The balance are the 450tons in ammo, so the 1100 tons are WAD as well.