I'm working on illustrations for my next published version, and just finished a couple examining the CG for the whole plane and for the plane after losing the engines and forward fuselage.
The whole plane graphic will be part of the knife edge flying discussion. I wanted to get a feel for the forces involved. It's at
https://ibb.co/cZNvWH
The damaged plane graphic is to help understand the dynamics after the first impact as discussed above. I guesstimated that the CG would move aft about 20 feet. I guesstimated the center of pressure using a simple cross section area calc, which doesn't take into account things like drag around sharp edges. So I wouldn't trust those values within less than a few feet. But it shows that the new CG and CP are pretty much lined up, which is why the sim would be highly sensitive to moving the CG a small amount. It's at
https://ibb.co/iWvSdx
The second one has a couple things I'll fix before putting it in the report.