It's Just That Easy?

<Sal'salabim points to the blueprint.>$B$BYou see where fel cannons are?$B$B<Sal'salabim draws an arrow denoting a change of direction.>$B$BYou turn fel cannon around and use on structures.$B$BWait! Don't be mad! One thing you not know. Overseers have key to turn cannons. You need key first! One from each overseer!$B$BNot so easy, eh?$B$BTake information back to Altruis.$B