The bottom on the ship is concave. The grilles for the warp engines have clear line-of sight on each other; that's something Andy specifically told me he did. Also, is that Spirit of Opportunity the raider ship that should be docked in the underside of the forward hull? There's also that thing above the base of the neck that should rise up.
This upskirt shot from Sirius Replicas clearifies
DS9Sega's point about the warp-field grilles and shows the Spirit of Opportunity docked like the Aerowing of the Intrepid classs, Waverider of the Nova class, or captains yachts of various Starfleet ships. Showing it within the cutaway is too confusing to the eye, either as depicted or in outline form. Maybe I should add two arrows in the figure. I was hoping the term "drop-launched" in the label would suffice.
I'm not sure what you mean about the thing at the base of the neck. I should look into that.
Extending the neck is a gesture of surrender, but that capability might have some maintenance or loading purpose, as well.