It can be hard to get your hands on high quality bamboo, but in particular hard to find a bamboo supplier that is willing to work with you to get the poles you need. Bamboo Habitat just sent me some samples of black and henon bamboo that were pretty amazing. They were properly aged and dried. More to the point he seems willing to go out of the way to get you what you are looking for. In comparison bamboo fencer was difficult/impossible to reach and only seemed interested in the project after they found my website. (Just for full disclosure this is not a paid advertisement, believe me I don’t make money from this site).