I’ve not bought off FAB before but this process sounds less than fab…
NOT what I would expect to be hearing. My assumption, like other products I’ve purchased in the past, would be that some-assembly-required is not part of the product. I’d expect a level with the metahuman in it, with all the parts applied.
YOU having to make anything to even get to an example/demo state, is suspect. Unless you are just missing the obvious, sounds like a scammy-seller to be honest.