Like it as it is, i dont see pirates as men that worry about the airodynamics of the ship they fly, as long as its hull is tough an power is great.
If it is bigger, i would suggest mounting 1 extra 180 degree turret, which can only shoot to the upper part of the gunboat... best part would be the roof of the "cockpit"
Other then that... leave it as it is i would suggest:)Love the design (as allways)
"War. War never changes. Since the dawn of human kind, when our ancestors first discovered the killing power of rock and bone, blood has been spilled in the name of everything, from God to justice to simple, psychotic rage."