Findsseeker; Listen to what old timers are telling you. I understand there is a strong temptation to go for the TID Machine. A big "BUT", even with the TID machine , to get the best from it you still have to learn to process the sounds. Learn what your machine is telling you. I and many others have found that it is easier for the brain to ID and process sounds than it is to process visual clues. Especially with the machine swinging two and fro. It is much more relaxing to hunt when you are processing sounds than it is to try and keep up with the motion of the machine and understand the bouncing ball. I first learned on a TID machine. When I went to the tone only machine I realized I was spending much to much time looking at the display on the TID. Then I had to go back and re-learn the TID. Get a good pair of Headphones, and be patient. You will be glad you did. poorman