i got a ace 250 for my grandkids they will perform better if you get a bigger coil we got the 10x14 ecclarator it seems to go a lot deeper with it he has found a 1881 indian head and a 1912 barber dime in a park that was hunted hard hope this can help you also there is a guy on this forum that may be able to help you his name is silverstar he does great with his dennis