Well… I was always going to have a some of the symbols have a line of text attached… so I thought - Why not just make a “text only symbol”? So I did. 
Also added the Button Hole symbol:
Added a “Flipped” toolbutton icon:
Added the Piece name as a label for reference:
Anchor points are now filled with the selected piece anchors"
Added a set of bit flags for each symbol Type so it’s real easy to adjust what’s editable in the dialog. For example these symbols are not duplicable,so the Duplictae bpx is disable when one of these is selected:
Others like the circle don’t need a width and length the so length is disabled:
Next up… updating the schema and writing the modeling nodes. :