Is there such a thing? I have been using Uni thread in 6/0 and mainly 8/0 for my bluegill and trout flies. The 8/0 is all I use for my winged wet flies.
However, someone gave me a partial spool of Danville Flymaster 6/0 thread. I LOVE how it lays so flat! However, I would still prefer it a bit smaller for some things. Does Danville make a similar thread in 8/0? I would think that would be perfect! A flat-laying, small diameter thread. Tell me it's so!