The metallic composition of your coins may differ from other's who read this forum. So once you get your X-705, my suggestion would be (as far as setting the discrimination Patterns) to simply toss several targets on the ground, space them out, and pass the coil over them. Make notes of the TID number for each type of coin, piece of jewelry or bit of "trash". Knowing the TID value of common pieces of trash (pull tabs, aluminum foil etc) can be just as worthwhile as the good stuff. Take note of how the targets react to various sweep speeds. Learn how to separate two targets that are close together by listening to the tones or "target blanking". If you're not in too big of a hurry, build yourself a test garden by clearing the ground of any "bad targets", and burying some goodies at depths ranging from an inch to 6 inches. Then learn how to identify each of those targets by using the audio and visual indicators. As far as the other settings are concerned, I'd suggest you go to the FAQFAQ section at the top of these posts, and read the article I wrote entitled "Understanding your X-TERRA. In there, you will find information on what each setting does, and how to accomplish the tasks. Ground Balance, Threshold, Sensitivity etc. If you have any questions, don't hesitate to ask. There are a lot of accomplished X-TERRA users on this forum. HH Randy