The first prototype was received well by the Federation, but fared rather badly in an unprovoked Ugokin attack.
Federation engineers rebuilt it, but determined not to be caught unprepared again, used it as a test platform for experimental weaponry.
This proved to be a perfect match, and the LL-553 had a long and successful life as a Federation gunship.
Matt Holland has built a nice little gunship.
The black and yellow stripe in slopes is a particularly nice touch. We also rather like Matt's interceptor, even if the colour of the cockpit is wrong.