Physics Objects in City Plans

[WeiseDrachenJaeger]

A question for those more experienced than myself - is there a way to ensure that an object whose physics you've disabled remains immobile when used in a city plan? I seem to remember reading some folks saying that these objects would revert on construction of the city plan, resulting in carefully constructed scenes losing important details, and I'm sincerely hoping there's some sort of workaround.

 

[WeiseDrachenJaeger]

So far I've tried boxing the items in with navmesh blocks and they responded by vibrating their way through anything solid until they were free. Time to consider alternative components, I guess.