This video is showing the multi point fill:  http://autode.sk/2hpCk5l

This video shows how to swap out just the one elbow.  http://autode.sk/2hptBQy

This video shows a live multipoint fill elbow swap in: http://autode.sk/2h1oiKc

I'm working on ironing out getting the long radius elbow in during the multi point fill which I thought was possible, but doesn't seem to be working when slope is applied