NEVER again. i don't care what brand it is. Unless it's based in eo, then it's going to be painful. You can't make a pain free t400. I will never touch t400 again. Not worth it. I'd rather do more pokes. And I'm not scared of pain, I used to shoot with 18g 1 1/2inch before I knew any better, lol. But fever, not being able to sit for a whole week or move my arm, feeling ill, etc is not for me.
My advice? Get t250 or t300 and just do more injects. I don't think the dk knock off is eo based, so even at 350mgs, it should be rather painful.