[Puke]

it could be done, but it could not be used to take out ships/planets/fleets anywhere in the system. it could only be used against targets that attack the ringworld.

all you would have to do is to make a weapon platform so large that it will only fit in the cargo space available on a ringworld or sphereworld, and make a mount sized for it.

of course, a planet with 25 facility slots devoted to cargo containers could probably hold one too, but it stands to reason that a planet devoted solely to this purpose would be just as effective as a ring world that supports one in its spare time. heck, with the appropriate cargo facilities, a ringworld might have several of them.

think of it, a 5GT weapon platform with a mount that does size*100 damage*500 range+20. or whatever.