I have a friend who suffers from fibromyalgia and has asked my help n using cannabis to treat it. High CBD bud is obviously the place to start, and has been marginally successful, but high CBD is still pretty low CBD and she ends up getting only slight relief before too much of a high sets in for her to be useful in daily life. So I am looking into extracting pure CBD. The literature says is boils at ~185C and THC boils 20 degrees or so below that, so I should be able to distill out the CBD with precise temperature controls. Has anyone heard of doing this or have some tips for how to make it work? Also, looking for advise on using CBD orally. Normally when you make edibles you want to heat them so you get the THC conversion, but in this case do I want to keep it cold to keep the CBD intact?