Andrew,
Though you may have your heart set on the mm as therapy, I have had success for long periods of time, (up to 2 years at a time) of putting the dreaded CH into 'remission' with prescribed medication from a neurologist. The therapy included Verapamil (calcium channel blocker) and oral steroids such as Prednisone ( anti-inflammatory) used TOGETHER, as prescribed!! The simplist fix of all was Oxygen deliver in the purest form from a canister with a proper regulator and NOT a concentrator. The problem with this, is that it is temporary, but almost IMMEDIATE. I wish you the best with everything, find what works for you, there is a combination for you.