Yucca is by far the easiest spindle and hearthboard to harvest, cut down to size and get ember. With a bow of bamboo and a cord of twisted leather, one should grab smoke and ember in under 30 seconds, as yucca has an ignition point of around 200 degrees. It also grows EVERYWHERE now, thanks to "the Joneses" and everyone keeping up with them. They are used as an ornamental in every region of the country. You can only get about 3 embers per hole, as opposed to the multiple I have gotten from cottonwood (up to 9), and cutting your notch can play harder because of the softness of the wood.