May not be new but at least its a new style for me. I cut the upper blank length to (standard length + thickness of centerband + ¼"), used a tube that was standard length + thinkness of centerband. Drilled out the ¼" with a bit the same diameter as the 7mm bushings OD. Turned the lower blank BtoB so the ¼" hollow in the upper tube would overlap the lower tube. Material is cedar.
http://www.ncwoodworker.net/gallery/showimage.php?i=4411&c=197
George
http://www.ncwoodworker.net/gallery/showimage.php?i=4411&c=197
George