See screenshots below.  What is the purpose of the child sheet metal feature (which I think showed up in SW2013), and why do its overrides default to ON?  Is there a way to disable this?  When we change our k-factors in the parent feature, the child feature overrides it, and if we forget to un-check the child overrides, we have problems.  (note that in my bottom screenshot, I had already un-checked the overrides.  Thanks for any help.