Here are some wip photos.
Almost all the major infrastructure is visible here, except for the engines and the twin front cannons. From here on it is mostly detail work, and then the next major step: the paintjob.
This is what the underside looks like, with the landing gear "retracted". The doors I built have the same texture as the bottom of the landing gear.
Of course, the top of the fuselage remains removable, so the interior can be viewed. This photo also shows the pins that hold the removable ball turrets in place, and the opened rear ramp.