I think there are a lot of KO Bones products out there. Not sure about wheels but I know I heard about Bearings and I'm pretty sure bushings too. Maybe that explains some of the varinces in size and quality? Powell seems like a company that would have better qc and consistency than others but I may be wrong.
Definitely a lot of bearings around 2020 and 2021, but I don't recall seeing any other Bones products on the counterfeit market - that is not to say it hasn't happened though.
I think that pretty much tanked when everything came back online around 2021 / 2022 but I guess there could still be a market for fake gear in Asia and some other places.
All the sets I have were from the authorised distribution, way too many to count as a couple of people go through Bones bushings like no tomorrow, so I have way too many sets, the hard versions in particular, so that would make sense if the consistency was not quite there with the heights. Also why one guy who rides them always seems to have a bit more trouble with them being exactly the same, but I have never really measured many from new, only the used ones, some very well used and squashed so much that putting them in any normal truck makes them feel like medium to soft for how much they give with the kingpin nut flush.
I've had several sets of bones hardcores recently and the heights were all over the place, I sanded some down to even them out
Like I had some where one top bushing was the same height as Indy and one was more like an ace
That's when I realized the bottom and top bones bushings are the exact same thing, the tops are just cut right where the conical part meets the cylindrical part. I've definitely gotten some where the top almost looks like a bottom, the cutting doesn't seem to always be precise
I do recall I have had a few sets I had to double check they weren't all just tops too, whereas some others are very clearly a bottom or top bushing.
I think more than anything some bushings from various brands that come in the conical shape really are much the same, just the bottom with a slight barrel and conical part, the tops just conical as usual. I have cut some bottoms down to make more tops as well, because some people seemed to always blow out the top bushings within the first week on some sets.
* I went looking for something else and came across this post, re cutting down Bones bushings. Thought you might like to see it if you hadn't already:
https://www.slapmagazine.com/index.php?topic=112631.msg3921323;topicseen#msg3921323