Re: Griffith Gnat - foam underbody possible?
Try this: I like to use electronics packing foam in about a 1/16th inch thickness. You could wrap this on the hook and over wrap with the herl. As stated earlier don't compress the foam too much as you will lose buoyancy. Good luck and let us know how it works.
I fish, therefore I am - but I gotta go to work first..."piscari ergo sum"