@MadScientist When doing my undergrad thesis I was working with micromolar concentrations, so shimming was very important. We did gradshim (or topshim) until all changes were under 100, then tweaked it manually. At my current one, the autoshim is slow, and while it gets things close, it is pretty terrible, and the broadening due to bad shimming can easily leave the aromatic region totally illegible, esph at 300 MHz.