Very nice looking flies! Is that red paint on the hook point? If it is I'd imagine that is an easy way of telling if a sharpening is in order - correct?
I've tied crabs with the craft yarn and haven't really used them much - they certainly look pretty cool in the flybox though.
They sell those velcro dots in craft departments too, and I'd imagine they'd work too. I was looking at felt in the craft store a couple of weeks ago trying to figure a use, looks like I found one. BTW picked up a bunch of closed cell foam sheets for a song at the craft store - gonna tie some gurglers.