LE Mod Conversion Issues

[grallonsphere]

So in my constant effort to assemble the most diverse stable of young studs, I attempted to port a follower originally created by NeusKharp:

 

https://www.nexusmods.com/skyrim/mods/87051

 

The problem is not that the port was unsuccessful - it was.  However the creator chose to use a body nif that isn't naked.  So of course I replaced that with the nifs from SAM light (body, hands, feet).  I also replaced the corresponding textures with those from SAM, as I did with 2 other followers from the same creator.  However in this case, there's a seam at the neck and a gap at the feet:

 

 

 

 

 

The other problem is that he/she chose to assign a 70/100 body weight to someone who looks no more than 15 ( sigh ... ).  Changing the weight in game (setnpcweight xx) produces an instant CTD.  Editing the weight in the CK - instant CTD.  I started a new game *after* editing the weight in XEdit, and while the weight looked finally more normal, the neck seam and feet gap remained.

[grallonsphere]

Aaannd once again I'm not getting anywhere with this.  After reducing the weight in Xedit and starting a new game I got what I wanted but there was a gap at the neck on top of the gap at the feet.  In fact the feet looked overlarge when compared to the weight 30 body (originally 70).  I don't understand how the general weight as defined in the mod doesn't apply to all the body's components.

 

This custom NPC also appeared to have been created using a custom race (with a female head as base). 

 

Well I've wasted enough time on this.

 

Thanks for all the help people.