There are numerous issues in the tech vols. They are for administering the purif rd (the levels of vitamins, minerals, etc.) and c/s-ing the rd, repair lists, trouble shooting grinding, etc. These were not really used to sell the rd but could be. There is info on radiation and how water is effective in getting rid of it, fats and how the body holds onto toxins in the fat cells if not supplied with new fats, blah, blah, blah. These were used mostly when the "mark" was already closed and on the rd, to answer questions or concerns, like "Why the heck did I pay for all this damn torture? Running, sweating for 5 hours!!!!"