as long as you are on methadone , u aren't sober. it's like switching from one drug to another, and in fact, most doctors see that its harder to get patients sober from methadone than heroine. As aas mentioned, gear can or is mentally addictive to some and it could cause you to lose control again and go down that path. I think, personally imho, u should get clean from drugs all together and maybe in a year or 2 of clean soberity, you should think twice about it.