What do you mean by you have points to place hangers? You have coordinates? A model element that needs changed to a hanger?
As mentioned MEP Fab parts are hard to work with in revit but I’m guessing you have already figured that out.
Hanger size is not an available instance parameter in the revit properties. By Dynamo can pull it up.
Element.Parameters is a useful node to figure out what you have to work with.
Also Parameter.ParameterByName needs to be used with Fab parts a lot instead of Element.GetParameterValue ByName but not always.
