Thats why im keep saying the differences about the ANH vader and the ESB Vader. Total different characters. Most if not all the later vaders were established by the ESB one.
After all its vader's ship. Or at least it has been established with that way.
Why not the 10+ km beast cant have a special location for his owner that is the second in command in the galaxy?
Imagine something like Jedi could happened if vader were meditating in his privare rooms..
-Angel