I think that's a fundamental flaw with your design. Without the original catamarans to support the saucer and Pylons, your model at that size is just gonna flop forward unless you have an extremely rigid metal frame in it.
This is especially true with the length of your pylons. I had that NX-01 kit, and the nacelles are fairly hefty for a kit. They sagged on the original layout unless you put a metal frame inside it. I just can't see this design being supported well enough to maintain its shape.
So, take a picture and post it.
I'd like to see it.
I don't have the model anymore, but its quite noticeable on all of them. Heres the best pic of it I can find.
As you can see, the nacelles are angled upwards in relation to the rest of the body. Although having looked at your neck portion, I wonder how your planning to connect it to the saucer. If its just gonna be glued onto the outside of it, I can't see that holding either. Maybe a slit going up inside the neck with a crossbeam pushed through that will hold it better.
This is all assuming your gonna have it as one floating piece, if your planning on putting up support struts everything i've said is kinda moot.