I think it's a quite straight forward idea. +1, add a side facs server/world in which a player could test their cannons, for example you go into factions and do /cannoning which would bring you to a plot where you could world edit cannons in and such. Although the down side is I feel people would maybe abuse it so world edit string in, so maybe put cooldowns on it, and maybe make it 1mil per entry or something to prevent abuse, but not make it stupidly hard to get into.