I dig the idea, but the shape feels a bit off to me. Try something more 'primitive' perhaps, to be more in line with the other simple shapes? Or connect it at the sides with the rest o the saucer to make an alcove for shuttles or something of the like.
I also think it could use a counterbalance on the bottom, perhaps a 'fin' continuing from the lines of the support structure.
I also think it could use a counterbalance on the bottom, perhaps a 'fin' continuing from the lines of the support structure.