@Andrew_Hannell I did some tests to automatically place face hosted families (or surface based, I’m not sure of their name in english since I’m still working with Revit 2016 in Italian) but the Dynamo node Springs.FamilyInstance.ByFace does not work with linked models and I am lightyears away from understaing Python.
Anyways I tried to start a topic on this subject here but went unnoticed: