RE: Rattling??
Rattling is my favorite tool for drawing in buck. In the early part of the season use them sparingly. Just lightly touch the tips together, like they are checking each other out. Do this for about 30 or 40 seconds then stop and wait for about 30 minutes and do another set. During the rut, bang the heck out of them for a longer time and really make some noise, but be ready and keep alert because they will come in quickly. Experiment and you'll enjoy the results.