After literally months of trying to get a response from anyone who has owned or used the Whites 15' Max coil.....I finally heard from someone. I was about to think that no one out there had ever used one. I knew from what little research I was able to do that this coil was heavy, a deep reader, and a bit expensive at $ 249.00. The person who responded heavily suggested the Detech 13' Ultimate coil over the Max. I was told that the Ultimate reads just as deep and is much lighter and kinder to the shoulders and elbows. This has prompted me to hold onto the Ultimate coil a while longer and give it another try. This was good news to my ears.