Starting from Parallel L-H waves, have centers hinge to make facing diamonds.
Now "secondly use strip the diamond in diamond chain thru". What do you get?
Basically, I believe your question is "What is the last part of Diamond Chain Thru?" Is it the Very Center 4 Cast Off 3/4, or the Centers of each side Cast Off 3/4?
For consistency sake, the last part of Diamond Chain Thru must be the Very Center 4 Cast Off 3/4.