They don't fit that good at all on the Phicen and even worse on a HOT STUFF body
IMO the neck post on the phicen and HSF was just not made for a HS from HT's especially the Widow's HS.
The problem is the neck post used on the Phicen and Hot Stuff is not only too narrow for the HT's HS it's too short.
You can fit it, but it will clearly fall off and it is extremely wobbly on both bodies.
IMO if you want to fit the HS onto any of these bodies, you need to cut into the skin and neck region and remove the neck piece out completely.
I don't recommend this at all!
I would post pics but last time I did of my examples, I saw such negative feedback and annoying rants and disgusting remarks that took up so many pages of this thread that I don't want to see that waste of nonsense on this thread ever again.