Now, a couple of tips:
First, as I said before, make a few flares to practice.
Second, lube the insert, where it goes against the pipe. You can use grease (I use assembly lube, because I'm finicky...
![Mr. Green :mrgreen:](./images/smilies/icon_mrgreen.gif)
Third, be aware you're in for a workout. Double flaring takes muscle.
I'll see if I can post pics of the process, so you have a better idea...