My personal definition of a selfbow would be a bow backed with nothing except air, except I would consider a bow of otherwise one piece of wood with a decorative non-functioning backing like snakeskin to be a selfbow. For the purposes of our contest, though, I see no reason to fix what ain't broke. It's already a lot of work for Don. At some point you can get so technical that it's just too much trouble to deal with. I think it works fine to have sinew, rawhide, or other non-wood backed bows in with the selfbows, and a seperate category for the wood and other hard laminated bows.