Stitch Diagrams Revisited ... and Revised

I've been conducting a test of a new pattern on Ravelry, and I discovered that there's no standardized name for half-double crochet's third loop.  That's the one behind the usual V-loops at the top of the stitch.

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And back loop -- what I called it in the diagram I posted earlier -- isn't in common usage.   (Although I'd seen it in a book with a section on half-double crochet, one book -- alas -- does not constitute a consensus.)

The loop is sometimes called the third loop, or the back-back bar.    

I decided to call it the back-back loop.  And re-did the diagram.  Several times, actually.

I like the new colors in the revised diagram.  The stitch formation, I think, is very easy to see. 

Though plastic cord isn't my favorite thing to crochet . . . .