Looking at your pictures I was mentally calculating CG and how close you had gotten the additional batteries and had the idea DJI should've had. If you look at the new X5 Mount and gimble they're both very obviously engineered to move the effective weight of the camera assembly significantly rearward to correct the CG as the X5 is so much heavier. Since they were technically developing a new "PRO" model a little more engineering would have allowed the installation of twin TB series batteries next to each other. An option already in practice on the Matrice. This would only require an updated battery box assembly, an integrated twin buss board, and an upper air frame which would widen out to twin humps to seamlessly blend in with the two batteries and allow for twin tail lamps. There would no longer be a need to tuck the camera as far back as they did. Given that the front of the existing battery is just about at the center of the aircraft the addition of another battery with the two centered side to side would seem to add just enough to allow the use of the existing gimble mount and no need for the additional pivot they created in the X5 gimble to move it further rearward. Twin TB48's, a V shaped double hump air frame, a great micro four thirds front and center would be bad *** IMO. It would add an additional 770g of batteries, add some with the air frame mods, probably save equally as much with the smaller gimble mount and smaller upper gimble as the air frame mods so in the end it would probably be a 4200g bird with 11400mAh on board. Given the real world performance experienced by what your doing Damon and with the effect the X5 has had I would expect it could possibly get to 30 minutes even with the X5.