I am seriously thinking about the F75 LTD as my next machine. I have been reading some good reviews on it. I currently have the DFX but I know I am not getting the depth that I need. Recently we dug some 3 ringers at 8" and I could barely get a chirp moving so slow as not to miss anything. I mainly hunt CW relics and old coins. No clad for me. So I am looking for depth and a very reliable machine. I have no problem going to a new and different machine. What is the learning curve going from the DFX to the LTD?