I started MM just over 2 years ago, so that makes me in a total of over 10 years since my accident...
Like you I use I high CBD for seizures and headaches....
In the morning a tincture that I have made, and early evening I vape.
After lots of trial and error I have added a strain of high THC into the mix with the CBD....Not measured but about a 70-30% mix....
The reason being as I found a strain that just about melts away my headache in just minutes.....It is strong thats why I dilute it and only use 30%.

I put this off and ignored a few of my medical professionals for 4 years....I would not say this is for all people, but works very good for me....
There is lots of pros and cons, and everyone should read up on it first....

(check out a 3 part series from CNN called Weed....real eye opener for me)