Stop in for a cup of coffee

Any issues of late with the flare tools like this? With my cheapo and the new Cornwell tool it seems to leave some unflared tubing at the split line. I am blaming the not quite to size tubing that is available nowadays.

Quick cleanup with a file on the nut side of the flare seems to fix it but it is annoying.
You tighten/loosen fitting several times, to seat it. You will notice nut turns a little more each time. I do that with every fitting. A little extra optional step is a dab of anti-sieze between nut and tube. Can thank me later.