I just ordered some 500 mesh tonight. I have a Steam Turbine clone that, I think, works best with a mesh wick. I've never done a mesh wick so I believe I have several weeks of pulling my hair out in front of me. Fortunately, pulling my hair out is my zen place so it should be therapeutic, if nothing else.
Oh and I can drag on my Russian 91 like it owes me money whilst I try new mesh builds...