Not sure I've explained all that very well!

Explanations were perfectly clear.

Unfortunately, nothing is really working well for the non-rectangular
autoshapes like flowchart decision shapes (diamonds). It would be a lot
easier if I could get a handle for the textframe object and determine
it's width. But for now I've had to do mockups for each shape based on
the standard font and make adjustments for different fonts and sizes.
It's gotten fairly convoluted.