(updated: 2013.03.25): I've taken a good long hard look at the model and concluded that it indeed needs to be boxier. I've updated the model accordingly.
After doing the Star Wing, I have gotten a number of requests to make a model of this craft.
For those unfamiliar with the it:
The Missile Boat was an advanced Imperial starfighter designed by Admiral Thrawn and built by Cygnus Spaceworks. Designed as a countermeasure against the rogue Grand Admiral Demetrius Zaarin and his supply of TIE Defenders, the Missile Boat was a descendant of the Alpha-class Xg-1 Star Wing, also manufactured by Cygnus Spaceworks.
The Missile Boat relied primarily on warheads for dogfighting and assaults, a notable difference from other Imperial starfighters, which relied more heavily on laser cannons. The Missile Boat also included an innovative propulsion feature known as the SubLight Acceleration Motor (SLAM).