thanks for the reply, the reason i asked my question the way i did was to open a dialog on a system i have been using for small size
flies and like today on the west branch, size 28 bwo.
I have been using the New Zealand indicator system for these very small flies, i install a bit of the wool per their instructions and
slide it up the tippet to about 24" above the fly, snip the indicator down to the size of a post on an 18 smaller and have at it. This works great
on fish feeding in the film etc., you can slide the indicator up or down the tippet depending on the situation. On the west branch
the indicator looks like one of the many air bubbles that float down the river. It really worked on the Beaverkill in May in between hatches.