as the title states Had no issues with the 4.1 update worked liked a charm dug a 1906 Indian cent on a spot I have hit many times I know the update had nothing to do with it but never lost the coil or anything. So just saying even if you don't use HF coils don't fret on Updating . Only thing I did not do which was my fault was jot down some saved prgrams which I can redo just need to find them but no big deal