Oops! I added the bottom plating and realized I built the rear section incorrectly. There was a big gap from the backplate to the back of the bottom plating which extends past the back of the engine casing. I had to model a Y shaped backplate to extend the gizmos in the back section farther aft. I remodeled the exhaust nozzle rings and that frame work altered the back enough that it became hard to stick to the references. I like the exhaust nozzle design so I just redesigned some of the back section from the references but it still has the feel of the original design. I hope it is not getting too cluttered though. Here are some updated images... Just a few more details to finish up the bottom and the modeling will be done. I added a front landing gear hatch so at some point I might also separate the rear gear doors so I can model landing gear. I started modeling the inside of the missile bay and will work on setting up a controller to open the doors and extend the missile racks.