More details added.
I've started on the pylon that will connect the engine to the Saucer. I've decided not to add windows here since it needs room for all the warp stuff. I might still add a few small windows or portholes closer to the saucer.
The last two pics are an idea for gimmick I've been tring to avoid but can't stop thinking about. I'm thinking the parts at the back of the engine might move in and out according to the speed it's moving at.
I think they would be moved out while at low warp or impulse. They move closer as the warp factor moves up.
Oops I kind of mixed up the second and third pics. Sorry.