And the underside of the saucer
And now the gripe. The neck is simply not long enough! If you try to fit the saucer on the curve of the hull blocks the torpedo launchers! I spent quite a bit of time trying to figure out how to get this right. My solution, double it up! I luckily printed 2 copies and glued the spare inside the saucer as you can see above, with the original neck (with torpedo launchers) attached to the secondary hull. Interestingly the alignment of the saucer with the warp nacelles is also corrected with this, otherwise the saucer sits too low.
When I saw the first pic I was hearing the sound of a chainsaw in my head..!