RE: SD or 19-nor?
IIRC Drab mentioned having used 19-Nor once years ago & said he got gyno from it. (could be wrong about it being Drab, but was definately a Mod). Wether that was anything to do with a possible lack of PCT etc, or the compound itself, you'd have to ask him.
Have you looked at Epistane/Havoc for your mate, BTW? Don't know much about it TBH, but don't recall seeing any mention of hair problems being associated with it. Again, may be wrong there.