Maybe the problem is that the hair has a default fit for David but there are only magnets to go from Mike1,2,3 to Mike 4.

I will try the magnet thing like you did just for my own amusement and maybe to learn. But I found that Neftis did a hairfit for this so I can just use it.

I did try the magnets on the DAZ wedge hair because I could go from Mike 3 to Mike 4. It worked fine. Created a fit morph and looks good in poser, but when I go to Daz Studio, the hair loads as if it was never adjusted. Same pose and everything. The hair fit morph I created is there but it says it's an empty range in DS. Why would that be?