I have been reading many questions that are showing up on forum...If you go to Dr. Eaton's Web site..many if not all and more of these questions are answered.... Just take the time to go thru each ite,..schedual, faq. everything....W hat's new... He explains everything ..It will really help you......WWW.HANDCENTER.ORG...If you go there you can also click on E-HAND and it will show you a N.A. procedure. Good Luck everyone...IT JUST TAKES A LITTLE TIME....BUT, IS VERY INFORMATIVE...........PRINT IT IF YOU HAVE A PRINTER...