I thought you said the gunboat WAS a capship. If it has capship maneuverability, it should have capship shields. If you dont want a BS shield stuck on it, why dont u just put the shield mount down to class 9? Also if you are gonna do that, can u plz make the handling a tad better, but not much because TBH, the gunboat shield cant cope with the pounding it recieves because it cant avoid incoming fire. It's a bullet magnet!
EDIT: also can it have a cruiser shield on it still? ;)