I haven't seen any ill effects from the following, but thought I should report it....
I had an anti-missile PDC class "Jason", with a loadout of 372 Sparrow.
I copied "Jason" to make an early-warning PDC class "Watchtower". I ripped all the missile launchers and magazines out of Watchtower as part of the design process. This all happened before Christmas.
I just noticed that Watchtower has a loadout of 372 Sparrow, with -372 space remaining. Oops
I suspect that the magazine capacity isn't being rechecked when magazines are removed.
Probably the best thing to do is make a check of magazine (and hangar?) capacity part of the "design errors" check, so that the design can't be locked if the loadout is wrong.
John