This is sigma vs Freq plot for 188Hf72+ made out of 1hr of injections post Saturday, April 5th. 
The 2nd photo Compares the resolution of 188Hf setting by looking at peaks of 205Au and 205Pb which are very close in frequency range. The resolution in the second 188Hf72+ setting(on Right) seems much better as two peaks can be seen clearly.