Thanks, gentlemen; I appreciate the input. At the moment, I've tied a few experiments using a clipped hook instead of a shank. I'll try some tube versions as well. Testing takes place tomorrow if the river's not blown.
Natrix-- before I forget: nice stonefly nymph you have on the other thread. On the tube you showed as an example-- do you let the hook swing or do you use junction tube?
The idea my informant passed along was that the fly should have as much motion as possible-- hence the tail hook or section should be moving as well as the dressing of the fly itself.
Don-- I've got to look at your furling process some more and see if it's an advantage for what I'm doing or trying to do. I sure can see some applications, but I'd like to think a bit before I ask questions.