Currently demonstrates elements in a workflow. Now about to make toolbox.
about to remove generics from model
removed generics from model - and it feels so good!  No more double casting (eg. (List<Number>) (List) listOfIntegers) and everything's nicer.  Working on Toolbox drag handler...
drag+drop works from toolbox, but from a workflow causes duplication.  Undo/redo nearly done
undo and redo work!!!