Mickfin, I can say that I've never had the elimination that high. The thing about the elimination on the Sea Hunter is, because it's a PI machine, you cant get rid of the iron, which is what you want to get rid of most. So, by putting the elimination up high, you might lose pulltabs, but you will also lose some gold, and perhaps some silver (small chains). If you are only after large gold and silver rings, then you could set the elimination higher, but you could miss smaller gold (although the Manual says you wont) and otherwise hard-to-detect targets (chains, bracelets etc). I only use the elimination knob to cut down the effects of black sand, not to knock out targets...also, I only use it when I feel I really need to do so, not just every time I detect...Hope this helps...It's a good machine...dont swing the coil too fast, or you will lose depth...one or two ft. per sec. is the recommended speed. Again, if you want to find chains and bracelets, use the elimination sparingly. Good luck with your hunting...I'm sure you'll do well.