Two of my heroes, Lefty Kreh and Mark Sosin, whose book Practical
Fishing KNots, has been my primary reference despite many books since
like it, describes the Bimini Twist has the most important knot to know,
and yet I don't sense that it is widely used among fly fishers.

Of course I can't really see how others tie their lines, because my
eyesight is going south along with my other declining powers.

Kreh and Sosin suggest using it with an Albright knot for even light fly
fishing. They also have an interesting idea for a super simplified all-
purpose leader for everything but dry fly fishing--but that's another
subject. TIA