Answered
This should be an easy one but everything I try in the Custom Format Script of the target text box sets said text box to the "Export Value" unless the selection doesn't have one, in which case I do get the actual visible selection.
I still feel that this is more complicated than it should be and I would appreciate help in simplifying the code.
Now for the next problem; This only works for existing selections in the Combo Box. I want manually entered selections to also appear and am yet unsuccessful. I feel it might need something along the lines of f.getItemAt(-1) as manually entered selections in a Combo Box (that allows "custom text") is seen as the last item in the list and is assigned the Value Index of "-1". Again, any help would be great.