After some tests with Geb in practical combat, I have few issues that might be neccesary to take a look at.
Light slots: They are swarming en masse bottom of the ship only, leaving upside very vulnerable.
Primary/medium slots: They were given very unnusual location, clustered in the very single place with limited arcs. None of them can actually fire backwards and two clip through the model with their barrels.
Heavy slots: except comical effect with how cerberus cannon looks on such thin wings, there is no balance concerns here.