Best solution is to use the threaded nutsert. No nutsert tool needed and the Inspire mount has full thread contact.Just so everyone knows, the nutsert installs nice if you have the tool, but the Inspire Holder does not have enough 1/4-20 exposed threads to connect to the nutsert.
So, I had to order this as an upgrade to the Inspire Holder -> DJI Metal Iron CNC Mobile Device Holder for Phantom 3 or Inspire 1 | eBay
Everything works fine now.
This is just an FYI if you plan to go the nutsert route.

Link to needed nutsert - http://m.summitracing.com/parts/AAF-ALL18548