When playing a low resource game, I was able to produce three dreadnoughts in some systems with a total OCF capacity of three on any given turn. Essentially giving that planet three times the OCF capacity it should of had. I am not sure if this was due to some modifier and it appears to be a bug.
I think I have this captured in a saved game if you need an example to work with.
I think I have this captured in a saved game if you need an example to work with.