I have another one for you and it may not be possible but from what I am seeing in RevitDbg it should be (I’m new though so I could be looking at it wrong). When I look at a family and look at the Builtin Parameter for Room Calculation point it looks through Revit lookup like this can be set with the API. I have found the examples using the Set Built-in Parameter node in the arch-lab package. I need to turn this flag on in some families we are using (in my example I am using furniture). Below is a capture of my script. Has anyone tried this or am I going down the wrong path? I have a hole series of families that my users would like to enable this function on so I was trying to script it.