I've just finished tillering a 60",50# @ 26" snakey osage flatbow.There is a strange grain pattern(appears to be woven),on its back.I don't believe it to be a ring violation,because there is no early wood showing ,but just to be safe I'm going to back it.Is there an advantage of silk over linen ,or,vice versa? Any comments would be appreciated.Thanks and God Bless, Pete C