Can't wait for my new 705 to get here. I had the 505 but got tired of no ground tracking, I found a lot of great coins and tokens with the 505 an really enjoyed it . Also getting the 13 inch coil, I had the 15 inch coil Tech coil but it was just to much to swing allday so switching to the 13. Any one got any tips on the differance in the two machines?