1. Place a Perforator in a Linear Solid (Wall 1)
2. Copy Linear Solid to create Wall 2.
3. Wall 2 retains the Perforator, but Wall 1 loses it... Not expected behaviour. There should be two Walls with their associated Perforators.
4. Actually, the Perforator is still part of the Wall 1's Parametric Solid tree... pretty confusing!
