I can help here. I've done this with many other types of shoots and vines. It works best if you regularly wet the shoot while it's hanging. This softens the fibers while the weight pulls them straight. With some harder woods you may want to increase the weight since these can be a little tougher. Don't use too much heat since you can dry it out too fast causing unwanted cracking. If you have a nice shady spot outside, this is the best place. Like an open overhang, shed, or barn is best. I've done this for years and never had a problem. Oh yeah, make sure that you strip off all of the bark. That is all I have for now. I'd like to see how these turn out.
G