I took a 2" pole and after studying it I bandsawed it in half lengthwise. I then bound the 2 halves back together with rope and small wood spacers between them for good air circulation. I kept them bound together for about 6 months then released them. Both stayed flat! When I work the stave I will induce some backset so I can control it somewhat. I get better results manipulating the wood into reflex than depending on nature to do it for me, in most cases.