Here is another small correction on the Tamiya (Academy) hull rear. The original Tamiya hull has a stepped rear plate (red outline). It should be flat. It also has small wings (red below) on the top rear hull to cover up the stepped rear plate area, which shouldn’t be there either.
You can see on the Orochi/Kinetic kit below how it should be. (Meng got it right too.) The rear plate should be flat and there are angled plates that the rear stowage boxes mount to.
To fix it, I cut the wings off and added a piece of sheet styrene on each side to complete the flat rear wall (orange arrows below). This leaves the small opening between the rear of the hull and the plates that mount the boxes.
The only cutting/sanding is on the little wings on the upper hull. For the lower, you only remove a couple triangle supports just inside the lower hull and add the new rear side walls, then paint it all to match.
I think it is a pretty effective way to represent this area and fix what Tamiya got wrong, and Academy copied onto their kits.