Personally, I'd advise against K&F.
I bought one (two actually) for Minolta>Sony. I liked the look of them (the black and orange looking fairly OEM for the Sony) and they didn't get too many bad reviews. But the black and orange sections are two different parts, and on one copy, those two parts started coming apart. Probably in less than a month of what I would say was fairly light use. The second one was going that way and felt a bit loose.
I don't know if it's the same for the Pentax>Fuji version, but worth looking into. If you do decide to go down that route, don't buy it direct from K&F unless you're prepared to wait. They're posted from China and mine took about two and half weeks to arrive (with no updates as to when it would turn up). I wanted to get using the Sony, so while I was waiting, I ordered another one from Amazon which turned up the next day - but that's how I ended up with two.
On further recommendations I bought a Fotasy one for my Sony A7 and then when I got the Canon R6II, I bought an Urth one.
Very happy with both of those.