I have tried using Karina's V but didn't work. Also tried free breast morphs but also didn't work. Think there might not be enough mesh detail in the K4 figure in those body sections. But in all fairness it was the V4 version I used not the YT. I will try that one for the K4. If true that the K4 is the same mesh as V4 why don't the V4 textures work with K4 or vice versa? And RDNA is pretty conservative so the KV I think would not be there. It was at the old Renderotica and I believe at ShareCG. Also the Rafelta's gen morph kit, another nice freebie adds what the KV does not add. Great combination if needed. Use them both all the time. Actually, got the KV and Rafelta to work on M4 with the two M4 to female morphs available free here in the free section. Great in a pinch when you need a a female to share the same M4 male outfits, accessories and/or textures. Now to test those morphs on K4.  As I said, I don't need anything obscene so the extra stuff isn't unnecessary. Just need a simple more realistic fold to keep it from looking Barbie-ish!

"seems the way things are made in the real world don't have to be same as in poser world. folding stuff seems way over my head and a lot more work than necessary. but then i have no clue how one would turn roll press and fold so it is all over my head anyway."

44 years in the industry.  Actually easier than trying to model it in 3d.

"Because they are morphed from the K4 kids the obvious genitals are missing. Adding the male bits is easy enough but for the female I am relegated to doing a fix to the texture or doing the little detail fixes in Post which I hate to do."

Don't know if it's here or RDNA, but Karina Vagina is what you're looking for.  Made for the YT or V4  but K4 has the same body mesh, works, if that's what you need.  Also works with the K4/v4 mixes.  If all you want is the groove, then you probably could avoid using the highly detailed "insert".  Or, a simple magnet will also sometimes suffice.  KV consists of a groove morph and the fiddly bits as a morphing prop. 

Doric.