Byron I have skeins of old sparkleaire in gold, green, brown and black. I know the "sparkle yarn" is now difficult to find except Gary's old Bookmailer still has some which is Dazzleaire. I met Gary a few times and have a couple of his sparkle pupas framed. His flies evolved somewhat from his first book, where he used 3 strands of yarn and marabou for the head. He claimed it was the clear antron fibers in the yarn that helped to trap air bubbles. Probably why the solid antron does not or might not be as effecient. Gary was working on a book about BWO's when he passed away, I bet that would of been informative.
Gene