Ten years ago I did a lot of looking at designs for cyclones,but never built one. But recently wanted to make a dust collecter for a sand blaster in the shop that I do little things for.

Anyway found that one can buy the cyclone bit on AliExpress or Ebay in a bunch of sizes. One suitable for use with a shop vac runs about $18. Took a long time to get here, but works well. Made of plastic so will not last forever, but still worth while.

Dan