Ask the JFM folks if they offer a "back-up", which is what I believe the extra piece of molding is called. Even if your painting is on a slim panel, the back-up piece allow the frame to hang flush with the wall, which is a nicer look than the frames that hang at an angle.
All framers who build their own frames can offer this...in fact I just received two
beautiful frames from
Abend) and they will make a back-up for any of the frames they offer. Yes, it costs a little more, but it has an enormous aesthetic impact.
While you're there, visit the
homepageThe people there are wonderful to work with.