Like that Pillcaster. Here in the UK we have a problem with the non native signal crayfish in many of our rivers. It is under represented in the flies we use. Now I have seen this I would try it for browns. The only problem is I've moved too far north. The signals haven't got this far... yet. Still I think I'll tie some of those up for when I do get to fish further south.
Cheers,
A.