After seeing the Crackleback fly in the Feather Craft catalog for several years I have decided to make a few for fishing trout. Until yesterday I have not seen them in a flyshop here in Colorado.
In the list of the 5 go to flys I see that it is listed several times.

Feather Craft talks of using it on the bottom of the river and using it as a dry fly. One question I have is: do you use a different hackle for the using it on the bottom of the river?

The recipe calls for a furnace hackle which commonly is brown. Is that what works best?

What body colors do you find most effective?

What sizes?

What fishing technique works best for this fly?