1. Merge your two projects.
2. create any number of clones of ShapeGroup. Place them as you need. Do not move ShapeGroup itself.
3. Part Compound the clones.
4. select the compound, and apply Lattice Array From Shape: internal placements
5. Create a shapebinder/ghost of the baseplate object from shapegroup.
6. Select the array of placements, the shapebinder/ghost, and apply Lattice Populate Copies.
7. Part Cut the copies off of the chamfer ...
Now you can move clones, and the cuts should update. You can even add more clones, add them to compound, and you'll have more cuts added automatically.