Guys you're tiring!
Firstly Mezieres doesn't heal everything and doesn't pretend to. It's not all about LBP as well, and saying so tends to prove that you know absolutely nothing on what you're talking about.
Secondly when someone gives you links about evidence and research, maybe you could read them. Here's another one http://depulp.u-strasbg.fr/stage/page541117.html , with the University of Strasbourg that provides the training in Postural reconstruction, with a curriculum leading to a diploma approved by French State, and I would be surprised if they hadn't be provided with strong scientific evidence (not only RCT) in order to get that approval.
If you contact the University they can give you access to the thesis about postural reconstruction, and that may include RCT, case studies, Wikipedia reference-linkMRI and EMG studies. As you don't seem to know, thesis are NOT referenced on Medline, but it doesn't mean they have no value!

Proving the efficacy of a technic is not all about RCT, as they are statistic results and you can make statistics say anything you want.
That's as well about knowing how and why it works, and on what, which includes doing it on volunteers under Xrays, doing comparative EMG , MRI before and after treatment to investigate what really happens.
That is the scientific approach, and I've been very shocked when Bernard asked me what was the relationship between pain and biomechanics, I learned that in my first year of studies!

Anyway I don't want to convince anybody, I know what i'm doing, why, and what i can't do, and as most physios I don't have time to do RCTs, nor enough patients presenting with the exact same LBP or else to give statistically significant results.
I keep thinking that muscles chains are a fantastic tool for assessment and treatment of any biomechanical disorders, perfectly consistent to use with PNF, Wikipedia reference-linkBobath, Maitland, Reflextherapies, Feldenkrais, electrotherapie and even acupuncture but that's just my own opinion, and will be my last post on the subject as I have patients to treat.