If you have significant deformities, you should consult a maxillofacial surgeon to get a diagnosis to possibly have oral surgery covered by insurance. 

Testimonials of people who have talked to Mike Mew have said he recommended them a modified LF III, which most maxillofacial surgeons won't perform unless you are a down-syndrome patient, and the ones that do are usually well into their 70s and nearing retirement. And he also recommends other jaw surgeries. He doesn't suggest them unless necessary, which for some of us it is a necessity. Then after this performing correct oral posture, or if you have the money, getting a Myofunctional therapist to prevent relapse and to further impact the bone to shape it to the desired orthotropic/functional outcome.