After painting, the wings/engine nacelles assembled - they just click together, and TET run into the joins to fix.
Tamiya would have you build the complete undercarriage into the wings at this stage - sounds like a recipe for later damage to me.
The cockpit interior is started, the bomb bay roof, and wing spars assembled
Not going to see this, as the bomb bay doors will be closed.
The pilots instrument panel is assembled, and the dials filed off, ready for the Eduard PE bits
There are numerous small boxes that need to be prepared for PE fronts ( electrical, radio etc ), time consuming & fiddly.
Dave