If you do them the way DC wants they will crush the lats better than chins can in my opinion. The keys are flaring the lats at the bottom forcing the deep stretch and controlling the negative. I get a lot of weird looks when I do them, but my back width(a serious weak point) has improved tremendously from them.
I know just what you mean about personal issues, and you are correct the internet isn't the place for it. I had to step away from DC(much to my dismay) for a bit to get things under control with my life but glad to hear you are on the up and up now. And your welcome, sometimes I don't think people are listening but you and a handful of other guys prove me wrong and keep me coming back to give some thoughts on here.