remove duplicates (at same position)

[MrEdgeNL]

When building in LeoCAD, I do appriciate the 'ctrl-D' (Duplicate) function a lot.
Sometimes (a bit too often), I'm missing the moving part/group arrows, so the current selection is gone.
(And re-selecting these parts is not-doable, since they overlap.)
So the solution is undo the duplicate by 'ctrl-z'.
But sometimes I missed that too, resuling in: 'duplicate parts at excactly the same position'.

Well, I do have a simple Phyton program, where I can analyze the .LDR files & automatically removes all 'duplicate lines' in the that file. (It doesn't -yet- make a differencte between 'submodels' & the generic model, but okay.)
Unfortunately I'm not able to write neat C++ code for that, offering some support to you.

Would it be an idea to:

• Adding a simple 'remove duplicates' button in the menu bar?
• Or would it be possible, to access LeoCAD, like an API interface, so I could 'control' LeoCAD from my own code??
  (That would be so great, starting with part list & camera view, maybe I could create a 'walk through' a Lego City?...)

Cheers,