A lot of good info in Dick's book, he is now working on an updated version because platinum/palladium is really "taking off" lately with new ways of getting to the end result. Things like pretreating papers with oxalic acid and using new methods of increasing contrast without increasing grain I'm sure will be covered along with a lot of other great info.
A lot of the factors and controls you mention can sometimes drive you crazy, that's my excuse anyway.
Good luck and hope to hear from you
Wm Blunt