I was trying to make my own default replacement, but every time I tried I was unsuccessful. I was following this tutorial and I think I missed or misunderstood some step/s or something. My first thought was I had subsets in wrong place so I tried to switch them up in property sets and 3DIDR file, but that didn't work (obviously, I wouldn't be here otherwise).
So I am asking you. What do you think it could be a problem?
I also included my 5th try to default replace something (ufbottomcaprisneaks in this case) for you to look at.
Thank you for your help.

Edit: I found the issue. And the issue was incorrectly extracted property sets and 3DIDR files. I discovered it while comparing my replacement to on from Rudhira.