I've been meaning to do some, but with everything going on in my life right now, I haven't got the time or space to do any tying. That, and I need to buy some mops.
I grabbed some material from a commercial fly tier and tied one but didn`t like it. But that`s just me. We don`t do float & fly over here and I find it inapropiate for a a horizontal presentation.
These things catch fish though. I`m sure it will work on a very light panfish jig.
I did make some up. The material came off of a hand sized scrub mop. They worked ok, but nothing spectacular. The short length of the material is a draw back in my opinion.