Cannadan, please be -very- careful with the technique used on them, technique to get them to pop will make all the difference, and make sure your conditions are dialed in as closely as possible, if not dead on for it. Good luck, and keep us updated!
Edit: If you haven't thought to do so, I could recommend use of high grit sandpaper to assist with this, scarring the edges of the beans and if you normally use wet paper towel, this would be a time to skip that - unless you have detailed information as to the chemicals retained in said paper towel after the bleaching process that could cause a total disaster with this delicate project.