Here are my comments/notes. I hope you dont mind me posting them here
1. Note the angle formed by the rear mast with the beginning of the quarterdecks.
2. Also note the complicated arrangement of bulwarks and railings.
3. Those portions are occuped by superstructure surrounded by a sort of short promenade decks.
4. The beams holding the three upper decks are equally spaced. From their number you can deduct decks' relative sizes.
5. Possibly, those are the ladders connecting the three upper decks. From their position, it seems that the top profile after of those decks might have been flat, or much lesser bended than it currently is in your model.
6. Flagstaff.
7. Air vents (?), much smaller than the ones encircling the funnels.