This is an outstanding build Gonzo! I've got an old Tamiya POW that I'm currently converting into DOY for a chum, whose dad worked at John Brown where the DOY was built. I'm using your model heavily as a guide for my own build.
You might be interested to know that the "cap/cover/lid things" were in fact called "Bonnets", and the "anchor chain restraining shackles" were Blake Slips. Each anchor cable would have had two, though one of each pair would have also had a turnbuckle to pull the anchor in tight to the hawse pipe and was called the Screw (or Bottle) Slip. When the ship was standing by to drop a hook, the latter was removed so that the anchor was being held up only by the braked capstan and the other Blake slip - riding on "Brakes and Blakes" as they would have said. The brake on the capstan would be released and when the time came to drop the anchor a seaman would hit the Blake Slip with a mallet, releasing the anchor to run out under its own weight.
The fact that you identified these and added them to your model shows an exceptional eye to detail. As well as the Bonnets, which most would not have spotted. It's little details like these that add excellence to a build.
