When you say wheel, do you mean the 3 hole airflow ring at the bottom?
Sounds like something is wrong, because the smallest one is as tight as a gnats asshole, and even the large one isn't particularly airy IMO.
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On a (kind of) related note, I found this thread about a replacement deck part with a different air intake - a couple of years old, from
@Simon G:
https://www.planetofthevapes.co.uk/...-hastur-mini-single-hole-airflow-post.166410/
Checked it out on slowtech and found 2 additional replacement sizes - a 1mm and a 0.6mm. Man is that going to be one tight motherfucker, I had to order it.