Just thought of another potentially useful Expansion option: Glue Head.
Use case: Imagine cutting a large number of small items out of one sheet, for example:
In this instance a second layer has to be glued to hold the safety pin, so leaving the cut pieces in place, the Glue Head could be programmed to add glue in the appropriate places.
Another use might be for adding glue to a complex paper cut-out for layering on a second complete sheet for support/colour contrast.
Elmers have a number of glue pens. The action to use might be more a dabbing (up/down), rather than drawing like an ink pen.