In my opinion DHC isn't just twice as strong as codeine, it's a much much more enjoyable high with far fewer side effects than regular codeine. With those pills you would definitely need to do a CWE, though i'm not certain you'll get too much of a hit from 100mg. Tartrate is just the salt form it comes in, nothing to be concerned about.
HEhehehe, I miss the days when I could take codiene. When I converted my daily amount of my D.O.C, its equal to 20,000 mgs of codeine. I remember a few months ago i ran out of my hydromorph and my script wasnt due for 2 days. I cwe'd a whole bottle of tylenol 3's and plugged it in one dose, the worst part is I still didnt feel much better.
Dhc is another story. Before I had my awesome doctor who gives me all the pain pills I want, I use to buy DHC contin online. Just 3-4 of the 120mg ones plugged sorted me out in a pinch.
OP- As unethical as it may sound, this drug ((DHC)) is simply amazing plugged. This is where it really shines. Your bioavailability is only a mere 20% orally though for DHC.