Behold! The USS Enterprise pizza cutter
Now to address the issue I alluded to regarding the saucer. Since this has been lifted from a game the texture overlap is quite hectic here. The entire superstructure area needs to be cut out. Once you do this you're asking for it to deform since the curve will not be correct (learned this experientially....)
The best way (for me, anyway) is to build from a central, re-inforced core piece. Now this is tricky here since the superstructure also has texture overlap, in that the part extends inside the saucer and does not just glue onto of it.
My solution;
And the side elevation showing the "hidden" texture