Our conflicts have been resolved and we have made progress!
An overall picture to start you out:

Along with some new detail to the landing gear, you can also see that there are red markings down the length of the plane, with some odd structures at some of their locations. These markings correspond to frames in a blueprint I found online, and the odd shapes mark key spots in cross sections provided for those frames. The partially built cross sections to the right of the aircraft are nowhere NEAR final, so do not panic that the plane might turn out looking like that.
A closer look at the frame markings:

Furthermore, Alcatraz has provided us with some potential cargo built by TheArmyGuy. Measuring the cargo hold dimensions, the plane can likely hold up to two of these helicopters, once the rotor is removed and packed separately:
